threejs shaderlib physical

fragment.glsl

//FRAGMENT
#define STANDARD
#ifdef PHYSICAL
    #define IOR
    #define SPECULAR
#endif
uniform vec3 diffuse;
uniform vec3 emissive;
uniform float roughness;
uniform float metalness;
uniform float opacity;
#ifdef IOR
    uniform float ior;
#endif
#ifdef SPECULAR
    uniform float specularIntensity;
    uniform vec3 specularColor;
    #ifdef USE_SPECULARINTENSITYMAP
        uniform sampler2D specularIntensityMap;
    #endif
    #ifdef USE_SPECULARCOLORMAP
        uniform sampler2D specularColorMap;
    #endif
#endif
#ifdef USE_CLEARCOAT
    uniform float clearcoat;
    uniform float clearcoatRoughness;
#endif
#ifdef USE_IRIDESCENCE
    uniform float iridescence;
    uniform float iridescenceIOR;
    uniform float iridescenceThicknessMinimum;
    uniform float iridescenceThicknessMaximum;
#endif
#ifdef USE_SHEEN
    uniform vec3 sheenColor;
    uniform float sheenRoughness;
    #ifdef USE_SHEENCOLORMAP
        uniform sampler2D sheenColorMap;
    #endif
    #ifdef USE_SHEENROUGHNESSMAP
        uniform sampler2D sheenRoughnessMap;
    #endif
#endif
varying vec3 vViewPosition;

//common begin
#define PI 3.141592653589793
#define PI2 6.283185307179586
#define PI_HALF 1.5707963267948966
#define RECIPROCAL_PI 0.3183098861837907
#define RECIPROCAL_PI2 0.15915494309189535
#define EPSILON 1e-6
#ifndef saturate
#define saturate( a ) clamp( a, 0.0, 1.0 )
#endif
#define whiteComplement( a ) ( 1.0 - saturate( a ) )
float pow2( const in float x ) { return x*x; }
vec3 pow2( const in vec3 x ) { return x*x; }
float pow3( const in float x ) { return x*x*x; }
float pow4( const in float x ) { float x2 = x*x; return x2*x2; }
float max3( const in vec3 v ) { return max( max( v.x, v.y ), v.z ); }
float average( const in vec3 v ) { return dot( v, vec3( 0.3333333 ) ); }
highp float rand( const in vec2 uv ) {
    const highp float a = 12.9898, b = 78.233, c = 43758.5453;
    highp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );
    return fract( sin( sn ) * c );
}
#ifdef HIGH_PRECISION
    float precisionSafeLength( vec3 v ) { return length( v ); }
#else
    float precisionSafeLength( vec3 v ) {
        float maxComponent = max3( abs( v ) );
        return length( v / maxComponent ) * maxComponent;
    }
#endif
struct IncidentLight {
    vec3 color;
    vec3 direction;
    bool visible;
};
struct ReflectedLight {
    vec3 directDiffuse;
    vec3 directSpecular;
    vec3 indirectDiffuse;
    vec3 indirectSpecular;
};
struct GeometricContext {
    vec3 position;
    vec3 normal;
    vec3 viewDir;
#ifdef USE_CLEARCOAT
    vec3 clearcoatNormal;
#endif
};
vec3 transformDirection( in vec3 dir, in mat4 matrix ) {
    return normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );
}
vec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {
    return normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );
}
mat3 transposeMat3( const in mat3 m ) {
    mat3 tmp;
    tmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );
    tmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );
    tmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );
    return tmp;
}
float luminance( const in vec3 rgb ) {
    const vec3 weights = vec3( 0.2126729, 0.7151522, 0.0721750 );
    return dot( weights, rgb );
}
bool isPerspectiveMatrix( mat4 m ) {
    return m[ 2 ][ 3 ] == - 1.0;
}
vec2 equirectUv( in vec3 dir ) {
    float u = atan( dir.z, dir.x ) * RECIPROCAL_PI2 + 0.5;
    float v = asin( clamp( dir.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;
    return vec2( u, v );
}
//common end


//packing begin
vec3 packNormalToRGB( const in vec3 normal ) {
    return normalize( normal ) * 0.5 + 0.5;
}
vec3 unpackRGBToNormal( const in vec3 rgb ) {
    return 2.0 * rgb.xyz - 1.0;
}
const float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;
const vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256., 256. );
const vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );
const float ShiftRight8 = 1. / 256.;
vec4 packDepthToRGBA( const in float v ) {
    vec4 r = vec4( fract( v * PackFactors ), v );
    r.yzw -= r.xyz * ShiftRight8;    return r * PackUpscale;
}
float unpackRGBAToDepth( const in vec4 v ) {
    return dot( v, UnpackFactors );
}
vec4 pack2HalfToRGBA( vec2 v ) {
    vec4 r = vec4( v.x, fract( v.x * 255.0 ), v.y, fract( v.y * 255.0 ) );
    return vec4( r.x - r.y / 255.0, r.y, r.z - r.w / 255.0, r.w );
}
vec2 unpackRGBATo2Half( vec4 v ) {
    return vec2( v.x + ( v.y / 255.0 ), v.z + ( v.w / 255.0 ) );
}
float viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {
    return ( viewZ + near ) / ( near - far );
}
float orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {
    return linearClipZ * ( near - far ) - near;
}
float viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {
    return ( ( near + viewZ ) * far ) / ( ( far - near ) * viewZ );
}
float perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {
    return ( near * far ) / ( ( far - near ) * invClipZ - far );
}
//packing end


//dithering_pars_fragment begin
#ifdef DITHERING
    vec3 dithering( vec3 color ) {
        float grid_position = rand( gl_FragCoord.xy );
        vec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );
        dither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );
        return color + dither_shift_RGB;
    }
#endif
//dithering_pars_fragment end


//color_pars_fragment begin
#if defined( USE_COLOR_ALPHA )
    varying vec4 vColor;
#elif defined( USE_COLOR )
    varying vec3 vColor;
#endif
//color_pars_fragment end


//uv_pars_fragment begin
#if ( defined( USE_UV ) && ! defined( UVS_VERTEX_ONLY ) )
    varying vec2 vUv;
#endif
//uv_pars_fragment end


//uv2_pars_fragment begin
#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )
    varying vec2 vUv2;
#endif
//uv2_pars_fragment end


//map_pars_fragment begin
#ifdef USE_MAP
    uniform sampler2D map;
#endif
//map_pars_fragment end


//alphamap_pars_fragment begin
#ifdef USE_ALPHAMAP
    uniform sampler2D alphaMap;
#endif
//alphamap_pars_fragment end


//alphatest_pars_fragment begin
#ifdef USE_ALPHATEST
    uniform float alphaTest;
#endif
//alphatest_pars_fragment end


//aomap_pars_fragment begin
#ifdef USE_AOMAP
    uniform sampler2D aoMap;
    uniform float aoMapIntensity;
#endif
//aomap_pars_fragment end


//lightmap_pars_fragment begin
#ifdef USE_LIGHTMAP
    uniform sampler2D lightMap;
    uniform float lightMapIntensity;
#endif
//lightmap_pars_fragment end


//emissivemap_pars_fragment begin
#ifdef USE_EMISSIVEMAP
    uniform sampler2D emissiveMap;
#endif
//emissivemap_pars_fragment end


//bsdfs begin
vec3 BRDF_Lambert( const in vec3 diffuseColor ) {
    return RECIPROCAL_PI * diffuseColor;
}
vec3 F_Schlick( const in vec3 f0, const in float f90, const in float dotVH ) {
    float fresnel = exp2( ( - 5.55473 * dotVH - 6.98316 ) * dotVH );
    return f0 * ( 1.0 - fresnel ) + ( f90 * fresnel );
}
float F_Schlick( const in float f0, const in float f90, const in float dotVH ) {
    float fresnel = exp2( ( - 5.55473 * dotVH - 6.98316 ) * dotVH );
    return f0 * ( 1.0 - fresnel ) + ( f90 * fresnel );
}
vec3 Schlick_to_F0( const in vec3 f, const in float f90, const in float dotVH ) {
    float x = clamp( 1.0 - dotVH, 0.0, 1.0 );
    float x2 = x * x;
    float x5 = clamp( x * x2 * x2, 0.0, 0.9999 );
    return ( f - vec3( f90 ) * x5 ) / ( 1.0 - x5 );
}
float V_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {
    float a2 = pow2( alpha );
    float gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );
    float gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );
    return 0.5 / max( gv + gl, EPSILON );
}
float D_GGX( const in float alpha, const in float dotNH ) {
    float a2 = pow2( alpha );
    float denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;
    return RECIPROCAL_PI * a2 / pow2( denom );
}
vec3 BRDF_GGX( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in vec3 f0, const in float f90, const in float roughness ) {
    float alpha = pow2( roughness );
    vec3 halfDir = normalize( lightDir + viewDir );
    float dotNL = saturate( dot( normal, lightDir ) );
    float dotNV = saturate( dot( normal, viewDir ) );
    float dotNH = saturate( dot( normal, halfDir ) );
    float dotVH = saturate( dot( viewDir, halfDir ) );
    vec3 F = F_Schlick( f0, f90, dotVH );
    float V = V_GGX_SmithCorrelated( alpha, dotNL, dotNV );
    float D = D_GGX( alpha, dotNH );
    return F * ( V * D );
}
#ifdef USE_IRIDESCENCE
    vec3 BRDF_GGX_Iridescence( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in vec3 f0, const in float f90, const in float iridescence, const in vec3 iridescenceFresnel, const in float roughness ) {
        float alpha = pow2( roughness );
        vec3 halfDir = normalize( lightDir + viewDir );
        float dotNL = saturate( dot( normal, lightDir ) );
        float dotNV = saturate( dot( normal, viewDir ) );
        float dotNH = saturate( dot( normal, halfDir ) );
        float dotVH = saturate( dot( viewDir, halfDir ) );
        vec3 F = mix( F_Schlick( f0, f90, dotVH ), iridescenceFresnel, iridescence );
        float V = V_GGX_SmithCorrelated( alpha, dotNL, dotNV );
        float D = D_GGX( alpha, dotNH );
        return F * ( V * D );
    }
#endif
vec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {
    const float LUT_SIZE = 64.0;
    const float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;
    const float LUT_BIAS = 0.5 / LUT_SIZE;
    float dotNV = saturate( dot( N, V ) );
    vec2 uv = vec2( roughness, sqrt( 1.0 - dotNV ) );
    uv = uv * LUT_SCALE + LUT_BIAS;
    return uv;
}
float LTC_ClippedSphereFormFactor( const in vec3 f ) {
    float l = length( f );
    return max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );
}
vec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {
    float x = dot( v1, v2 );
    float y = abs( x );
    float a = 0.8543985 + ( 0.4965155 + 0.0145206 * y ) * y;
    float b = 3.4175940 + ( 4.1616724 + y ) * y;
    float v = a / b;
    float theta_sintheta = ( x > 0.0 ) ? v : 0.5 * inversesqrt( max( 1.0 - x * x, 1e-7 ) ) - v;
    return cross( v1, v2 ) * theta_sintheta;
}
vec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {
    vec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];
    vec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];
    vec3 lightNormal = cross( v1, v2 );
    if( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );
    vec3 T1, T2;
    T1 = normalize( V - N * dot( V, N ) );
    T2 = - cross( N, T1 );
    mat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );
    vec3 coords[ 4 ];
    coords[ 0 ] = mat * ( rectCoords[ 0 ] - P );
    coords[ 1 ] = mat * ( rectCoords[ 1 ] - P );
    coords[ 2 ] = mat * ( rectCoords[ 2 ] - P );
    coords[ 3 ] = mat * ( rectCoords[ 3 ] - P );
    coords[ 0 ] = normalize( coords[ 0 ] );
    coords[ 1 ] = normalize( coords[ 1 ] );
    coords[ 2 ] = normalize( coords[ 2 ] );
    coords[ 3 ] = normalize( coords[ 3 ] );
    vec3 vectorFormFactor = vec3( 0.0 );
    vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );
    vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );
    vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );
    vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );
    float result = LTC_ClippedSphereFormFactor( vectorFormFactor );
    return vec3( result );
}
float G_BlinnPhong_Implicit( ) {
    return 0.25;
}
float D_BlinnPhong( const in float shininess, const in float dotNH ) {
    return RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );
}
vec3 BRDF_BlinnPhong( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float shininess ) {
    vec3 halfDir = normalize( lightDir + viewDir );
    float dotNH = saturate( dot( normal, halfDir ) );
    float dotVH = saturate( dot( viewDir, halfDir ) );
    vec3 F = F_Schlick( specularColor, 1.0, dotVH );
    float G = G_BlinnPhong_Implicit( );
    float D = D_BlinnPhong( shininess, dotNH );
    return F * ( G * D );
}
#if defined( USE_SHEEN )
float D_Charlie( float roughness, float dotNH ) {
    float alpha = pow2( roughness );
    float invAlpha = 1.0 / alpha;
    float cos2h = dotNH * dotNH;
    float sin2h = max( 1.0 - cos2h, 0.0078125 );
    return ( 2.0 + invAlpha ) * pow( sin2h, invAlpha * 0.5 ) / ( 2.0 * PI );
}
float V_Neubelt( float dotNV, float dotNL ) {
    return saturate( 1.0 / ( 4.0 * ( dotNL + dotNV - dotNL * dotNV ) ) );
}
vec3 BRDF_Sheen( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, vec3 sheenColor, const in float sheenRoughness ) {
    vec3 halfDir = normalize( lightDir + viewDir );
    float dotNL = saturate( dot( normal, lightDir ) );
    float dotNV = saturate( dot( normal, viewDir ) );
    float dotNH = saturate( dot( normal, halfDir ) );
    float D = D_Charlie( sheenRoughness, dotNH );
    float V = V_Neubelt( dotNV, dotNL );
    return sheenColor * ( D * V );
}
#endif
//bsdfs end


//iridescence_fragment begin
#ifdef USE_IRIDESCENCE
    const mat3 XYZ_TO_REC709 = mat3(
         3.2404542, -0.9692660,  0.0556434,
        -1.5371385,  1.8760108, -0.2040259,
        -0.4985314,  0.0415560,  1.0572252
    );
    vec3 Fresnel0ToIor( vec3 fresnel0 ) {
        vec3 sqrtF0 = sqrt( fresnel0 );
        return ( vec3( 1.0 ) + sqrtF0 ) / ( vec3( 1.0 ) - sqrtF0 );
    }
    vec3 IorToFresnel0( vec3 transmittedIor, float incidentIor ) {
        return pow2( ( transmittedIor - vec3( incidentIor ) ) / ( transmittedIor + vec3( incidentIor ) ) );
    }
    float IorToFresnel0( float transmittedIor, float incidentIor ) {
        return pow2( ( transmittedIor - incidentIor ) / ( transmittedIor + incidentIor ));
    }
    vec3 evalSensitivity( float OPD, vec3 shift ) {
        float phase = 2.0 * PI * OPD * 1.0e-9;
        vec3 val = vec3( 5.4856e-13, 4.4201e-13, 5.2481e-13 );
        vec3 pos = vec3( 1.6810e+06, 1.7953e+06, 2.2084e+06 );
        vec3 var = vec3( 4.3278e+09, 9.3046e+09, 6.6121e+09 );
        vec3 xyz = val * sqrt( 2.0 * PI * var ) * cos( pos * phase + shift ) * exp( - pow2( phase ) * var );
        xyz.x += 9.7470e-14 * sqrt( 2.0 * PI * 4.5282e+09 ) * cos( 2.2399e+06 * phase + shift[ 0 ] ) * exp( - 4.5282e+09 * pow2( phase ) );
        xyz /= 1.0685e-7;
        vec3 rgb = XYZ_TO_REC709 * xyz;
        return rgb;
    }
    vec3 evalIridescence( float outsideIOR, float eta2, float cosTheta1, float thinFilmThickness, vec3 baseF0 ) {
        vec3 I;
        float iridescenceIOR = mix( outsideIOR, eta2, smoothstep( 0.0, 0.03, thinFilmThickness ) );
        float sinTheta2Sq = pow2( outsideIOR / iridescenceIOR ) * ( 1.0 - pow2( cosTheta1 ) );
        float cosTheta2Sq = 1.0 - sinTheta2Sq;
        if ( cosTheta2Sq < 0.0 ) {
             return vec3( 1.0 );
        }
        float cosTheta2 = sqrt( cosTheta2Sq );
        float R0 = IorToFresnel0( iridescenceIOR, outsideIOR );
        float R12 = F_Schlick( R0, 1.0, cosTheta1 );
        float R21 = R12;
        float T121 = 1.0 - R12;
        float phi12 = 0.0;
        if ( iridescenceIOR < outsideIOR ) phi12 = PI;
        float phi21 = PI - phi12;
        vec3 baseIOR = Fresnel0ToIor( clamp( baseF0, 0.0, 0.9999 ) );        vec3 R1 = IorToFresnel0( baseIOR, iridescenceIOR );
        vec3 R23 = F_Schlick( R1, 1.0, cosTheta2 );
        vec3 phi23 = vec3( 0.0 );
        if ( baseIOR[ 0 ] < iridescenceIOR ) phi23[ 0 ] = PI;
        if ( baseIOR[ 1 ] < iridescenceIOR ) phi23[ 1 ] = PI;
        if ( baseIOR[ 2 ] < iridescenceIOR ) phi23[ 2 ] = PI;
        float OPD = 2.0 * iridescenceIOR * thinFilmThickness * cosTheta2;
        vec3 phi = vec3( phi21 ) + phi23;
        vec3 R123 = clamp( R12 * R23, 1e-5, 0.9999 );
        vec3 r123 = sqrt( R123 );
        vec3 Rs = pow2( T121 ) * R23 / ( vec3( 1.0 ) - R123 );
        vec3 C0 = R12 + Rs;
        I = C0;
        vec3 Cm = Rs - T121;
        for ( int m = 1; m <= 2; ++ m ) {
            Cm *= r123;
            vec3 Sm = 2.0 * evalSensitivity( float( m ) * OPD, float( m ) * phi );
            I += Cm * Sm;
        }
        return max( I, vec3( 0.0 ) );
    }
#endif
//iridescence_fragment end


//cube_uv_reflection_fragment begin
#ifdef ENVMAP_TYPE_CUBE_UV
    #define cubeUV_minMipLevel 4.0
    #define cubeUV_minTileSize 16.0
    float getFace( vec3 direction ) {
        vec3 absDirection = abs( direction );
        float face = - 1.0;
        if ( absDirection.x > absDirection.z ) {
            if ( absDirection.x > absDirection.y )
                face = direction.x > 0.0 ? 0.0 : 3.0;
            else
                face = direction.y > 0.0 ? 1.0 : 4.0;
        } else {
            if ( absDirection.z > absDirection.y )
                face = direction.z > 0.0 ? 2.0 : 5.0;
            else
                face = direction.y > 0.0 ? 1.0 : 4.0;
        }
        return face;
    }
    vec2 getUV( vec3 direction, float face ) {
        vec2 uv;
        if ( face == 0.0 ) {
            uv = vec2( direction.z, direction.y ) / abs( direction.x );
        } else if ( face == 1.0 ) {
            uv = vec2( - direction.x, - direction.z ) / abs( direction.y );
        } else if ( face == 2.0 ) {
            uv = vec2( - direction.x, direction.y ) / abs( direction.z );
        } else if ( face == 3.0 ) {
            uv = vec2( - direction.z, direction.y ) / abs( direction.x );
        } else if ( face == 4.0 ) {
            uv = vec2( - direction.x, direction.z ) / abs( direction.y );
        } else {
            uv = vec2( direction.x, direction.y ) / abs( direction.z );
        }
        return 0.5 * ( uv + 1.0 );
    }
    vec3 bilinearCubeUV( sampler2D envMap, vec3 direction, float mipInt ) {
        float face = getFace( direction );
        float filterInt = max( cubeUV_minMipLevel - mipInt, 0.0 );
        mipInt = max( mipInt, cubeUV_minMipLevel );
        float faceSize = exp2( mipInt );
        vec2 uv = getUV( direction, face ) * ( faceSize - 2.0 ) + 1.0;
        if ( face > 2.0 ) {
            uv.y += faceSize;
            face -= 3.0;
        }
        uv.x += face * faceSize;
        uv.x += filterInt * 3.0 * cubeUV_minTileSize;
        uv.y += 4.0 * ( exp2( CUBEUV_MAX_MIP ) - faceSize );
        uv.x *= CUBEUV_TEXEL_WIDTH;
        uv.y *= CUBEUV_TEXEL_HEIGHT;
        #ifdef texture2DGradEXT
            return texture2DGradEXT( envMap, uv, vec2( 0.0 ), vec2( 0.0 ) ).rgb;
        #else
            return texture2D( envMap, uv ).rgb;
        #endif
    }
    #define cubeUV_r0 1.0
    #define cubeUV_v0 0.339
    #define cubeUV_m0 - 2.0
    #define cubeUV_r1 0.8
    #define cubeUV_v1 0.276
    #define cubeUV_m1 - 1.0
    #define cubeUV_r4 0.4
    #define cubeUV_v4 0.046
    #define cubeUV_m4 2.0
    #define cubeUV_r5 0.305
    #define cubeUV_v5 0.016
    #define cubeUV_m5 3.0
    #define cubeUV_r6 0.21
    #define cubeUV_v6 0.0038
    #define cubeUV_m6 4.0
    float roughnessToMip( float roughness ) {
        float mip = 0.0;
        if ( roughness >= cubeUV_r1 ) {
            mip = ( cubeUV_r0 - roughness ) * ( cubeUV_m1 - cubeUV_m0 ) / ( cubeUV_r0 - cubeUV_r1 ) + cubeUV_m0;
        } else if ( roughness >= cubeUV_r4 ) {
            mip = ( cubeUV_r1 - roughness ) * ( cubeUV_m4 - cubeUV_m1 ) / ( cubeUV_r1 - cubeUV_r4 ) + cubeUV_m1;
        } else if ( roughness >= cubeUV_r5 ) {
            mip = ( cubeUV_r4 - roughness ) * ( cubeUV_m5 - cubeUV_m4 ) / ( cubeUV_r4 - cubeUV_r5 ) + cubeUV_m4;
        } else if ( roughness >= cubeUV_r6 ) {
            mip = ( cubeUV_r5 - roughness ) * ( cubeUV_m6 - cubeUV_m5 ) / ( cubeUV_r5 - cubeUV_r6 ) + cubeUV_m5;
        } else {
            mip = - 2.0 * log2( 1.16 * roughness );        }
        return mip;
    }
    vec4 textureCubeUV( sampler2D envMap, vec3 sampleDir, float roughness ) {
        float mip = clamp( roughnessToMip( roughness ), cubeUV_m0, CUBEUV_MAX_MIP );
        float mipF = fract( mip );
        float mipInt = floor( mip );
        vec3 color0 = bilinearCubeUV( envMap, sampleDir, mipInt );
        if ( mipF == 0.0 ) {
            return vec4( color0, 1.0 );
        } else {
            vec3 color1 = bilinearCubeUV( envMap, sampleDir, mipInt + 1.0 );
            return vec4( mix( color0, color1, mipF ), 1.0 );
        }
    }
#endif
//cube_uv_reflection_fragment end


//envmap_common_pars_fragment begin
#ifdef USE_ENVMAP
    uniform float envMapIntensity;
    uniform float flipEnvMap;
    #ifdef ENVMAP_TYPE_CUBE
        uniform samplerCube envMap;
    #else
        uniform sampler2D envMap;
    #endif
    
#endif
//envmap_common_pars_fragment end


//envmap_physical_pars_fragment begin
#if defined( USE_ENVMAP )
    vec3 getIBLIrradiance( const in vec3 normal ) {
        #if defined( ENVMAP_TYPE_CUBE_UV )
            vec3 worldNormal = inverseTransformDirection( normal, viewMatrix );
            vec4 envMapColor = textureCubeUV( envMap, worldNormal, 1.0 );
            return PI * envMapColor.rgb * envMapIntensity;
        #else
            return vec3( 0.0 );
        #endif
    }
    vec3 getIBLRadiance( const in vec3 viewDir, const in vec3 normal, const in float roughness ) {
        #if defined( ENVMAP_TYPE_CUBE_UV )
            vec3 reflectVec = reflect( - viewDir, normal );
            reflectVec = normalize( mix( reflectVec, normal, roughness * roughness) );
            reflectVec = inverseTransformDirection( reflectVec, viewMatrix );
            vec4 envMapColor = textureCubeUV( envMap, reflectVec, roughness );
            return envMapColor.rgb * envMapIntensity;
        #else
            return vec3( 0.0 );
        #endif
    }
#endif
//envmap_physical_pars_fragment end


//fog_pars_fragment begin
#ifdef USE_FOG
    uniform vec3 fogColor;
    varying float vFogDepth;
    #ifdef FOG_EXP2
        uniform float fogDensity;
    #else
        uniform float fogNear;
        uniform float fogFar;
    #endif
#endif
//fog_pars_fragment end


//lights_pars_begin begin
uniform bool receiveShadow;
uniform vec3 ambientLightColor;
uniform vec3 lightProbe[ 9 ];
vec3 shGetIrradianceAt( in vec3 normal, in vec3 shCoefficients[ 9 ] ) {
    float x = normal.x, y = normal.y, z = normal.z;
    vec3 result = shCoefficients[ 0 ] * 0.886227;
    result += shCoefficients[ 1 ] * 2.0 * 0.511664 * y;
    result += shCoefficients[ 2 ] * 2.0 * 0.511664 * z;
    result += shCoefficients[ 3 ] * 2.0 * 0.511664 * x;
    result += shCoefficients[ 4 ] * 2.0 * 0.429043 * x * y;
    result += shCoefficients[ 5 ] * 2.0 * 0.429043 * y * z;
    result += shCoefficients[ 6 ] * ( 0.743125 * z * z - 0.247708 );
    result += shCoefficients[ 7 ] * 2.0 * 0.429043 * x * z;
    result += shCoefficients[ 8 ] * 0.429043 * ( x * x - y * y );
    return result;
}
vec3 getLightProbeIrradiance( const in vec3 lightProbe[ 9 ], const in vec3 normal ) {
    vec3 worldNormal = inverseTransformDirection( normal, viewMatrix );
    vec3 irradiance = shGetIrradianceAt( worldNormal, lightProbe );
    return irradiance;
}
vec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {
    vec3 irradiance = ambientLightColor;
    return irradiance;
}
float getDistanceAttenuation( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {
    #if defined ( PHYSICALLY_CORRECT_LIGHTS )
        float distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );
        if ( cutoffDistance > 0.0 ) {
            distanceFalloff *= pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );
        }
        return distanceFalloff;
    #else
        if ( cutoffDistance > 0.0 && decayExponent > 0.0 ) {
            return pow( saturate( - lightDistance / cutoffDistance + 1.0 ), decayExponent );
        }
        return 1.0;
    #endif
}
float getSpotAttenuation( const in float coneCosine, const in float penumbraCosine, const in float angleCosine ) {
    return smoothstep( coneCosine, penumbraCosine, angleCosine );
}
#if 0 > 0
    struct DirectionalLight {
        vec3 direction;
        vec3 color;
    };
    uniform DirectionalLight directionalLights[ 0 ];
    void getDirectionalLightInfo( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight light ) {
        light.color = directionalLight.color;
        light.direction = directionalLight.direction;
        light.visible = true;
    }
#endif
#if 0 > 0
    struct PointLight {
        vec3 position;
        vec3 color;
        float distance;
        float decay;
    };
    uniform PointLight pointLights[ 0 ];
    void getPointLightInfo( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight light ) {
        vec3 lVector = pointLight.position - geometry.position;
        light.direction = normalize( lVector );
        float lightDistance = length( lVector );
        light.color = pointLight.color;
        light.color *= getDistanceAttenuation( lightDistance, pointLight.distance, pointLight.decay );
        light.visible = ( light.color != vec3( 0.0 ) );
    }
#endif
#if 0 > 0
    struct SpotLight {
        vec3 position;
        vec3 direction;
        vec3 color;
        float distance;
        float decay;
        float coneCos;
        float penumbraCos;
    };
    uniform SpotLight spotLights[ 0 ];
    void getSpotLightInfo( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight light ) {
        vec3 lVector = spotLight.position - geometry.position;
        light.direction = normalize( lVector );
        float angleCos = dot( light.direction, spotLight.direction );
        float spotAttenuation = getSpotAttenuation( spotLight.coneCos, spotLight.penumbraCos, angleCos );
        if ( spotAttenuation > 0.0 ) {
            float lightDistance = length( lVector );
            light.color = spotLight.color * spotAttenuation;
            light.color *= getDistanceAttenuation( lightDistance, spotLight.distance, spotLight.decay );
            light.visible = ( light.color != vec3( 0.0 ) );
        } else {
            light.color = vec3( 0.0 );
            light.visible = false;
        }
    }
#endif
#if 0 > 0
    struct RectAreaLight {
        vec3 color;
        vec3 position;
        vec3 halfWidth;
        vec3 halfHeight;
    };
    uniform sampler2D ltc_1;    uniform sampler2D ltc_2;
    uniform RectAreaLight rectAreaLights[ 0 ];
#endif
#if 1 > 0
    struct HemisphereLight {
        vec3 direction;
        vec3 skyColor;
        vec3 groundColor;
    };
    uniform HemisphereLight hemisphereLights[ 1 ];
    vec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in vec3 normal ) {
        float dotNL = dot( normal, hemiLight.direction );
        float hemiDiffuseWeight = 0.5 * dotNL + 0.5;
        vec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );
        return irradiance;
    }
#endif
//lights_pars_begin end


//normal_pars_fragment begin
#ifndef FLAT_SHADED
    varying vec3 vNormal;
    #ifdef USE_TANGENT
        varying vec3 vTangent;
        varying vec3 vBitangent;
    #endif
#endif
//normal_pars_fragment end


//lights_physical_pars_fragment begin
struct PhysicalMaterial {
    vec3 diffuseColor;
    float roughness;
    vec3 specularColor;
    float specularF90;
    #ifdef USE_CLEARCOAT
        float clearcoat;
        float clearcoatRoughness;
        vec3 clearcoatF0;
        float clearcoatF90;
    #endif
    #ifdef USE_IRIDESCENCE
        float iridescence;
        float iridescenceIOR;
        float iridescenceThickness;
        vec3 iridescenceFresnel;
        vec3 iridescenceF0;
    #endif
    #ifdef USE_SHEEN
        vec3 sheenColor;
        float sheenRoughness;
    #endif
    #ifdef IOR
        float ior;
    #endif
    #ifdef USE_TRANSMISSION
        float transmission;
        float transmissionAlpha;
        float thickness;
        float attenuationDistance;
        vec3 attenuationColor;
    #endif
};
vec3 clearcoatSpecular = vec3( 0.0 );
vec3 sheenSpecular = vec3( 0.0 );
float IBLSheenBRDF( const in vec3 normal, const in vec3 viewDir, const in float roughness ) {
    float dotNV = saturate( dot( normal, viewDir ) );
    float r2 = roughness * roughness;
    float a = roughness < 0.25 ? -339.2 * r2 + 161.4 * roughness - 25.9 : -8.48 * r2 + 14.3 * roughness - 9.95;
    float b = roughness < 0.25 ? 44.0 * r2 - 23.7 * roughness + 3.26 : 1.97 * r2 - 3.27 * roughness + 0.72;
    float DG = exp( a * dotNV + b ) + ( roughness < 0.25 ? 0.0 : 0.1 * ( roughness - 0.25 ) );
    return saturate( DG * RECIPROCAL_PI );
}
vec2 DFGApprox( const in vec3 normal, const in vec3 viewDir, const in float roughness ) {
    float dotNV = saturate( dot( normal, viewDir ) );
    const vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );
    const vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );
    vec4 r = roughness * c0 + c1;
    float a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;
    vec2 fab = vec2( - 1.04, 1.04 ) * a004 + r.zw;
    return fab;
}
vec3 EnvironmentBRDF( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float roughness ) {
    vec2 fab = DFGApprox( normal, viewDir, roughness );
    return specularColor * fab.x + specularF90 * fab.y;
}
#ifdef USE_IRIDESCENCE
void computeMultiscatteringIridescence( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float iridescence, const in vec3 iridescenceF0, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {
#else
void computeMultiscattering( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {
#endif
    vec2 fab = DFGApprox( normal, viewDir, roughness );
    #ifdef USE_IRIDESCENCE
        vec3 Fr = mix( specularColor, iridescenceF0, iridescence );
    #else
        vec3 Fr = specularColor;
    #endif
    vec3 FssEss = Fr * fab.x + specularF90 * fab.y;
    float Ess = fab.x + fab.y;
    float Ems = 1.0 - Ess;
    vec3 Favg = Fr + ( 1.0 - Fr ) * 0.047619;    vec3 Fms = FssEss * Favg / ( 1.0 - Ems * Favg );
    singleScatter += FssEss;
    multiScatter += Fms * Ems;
}
#if 0 > 0
    void RE_Direct_RectArea_Physical( const in RectAreaLight rectAreaLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {
        vec3 normal = geometry.normal;
        vec3 viewDir = geometry.viewDir;
        vec3 position = geometry.position;
        vec3 lightPos = rectAreaLight.position;
        vec3 halfWidth = rectAreaLight.halfWidth;
        vec3 halfHeight = rectAreaLight.halfHeight;
        vec3 lightColor = rectAreaLight.color;
        float roughness = material.roughness;
        vec3 rectCoords[ 4 ];
        rectCoords[ 0 ] = lightPos + halfWidth - halfHeight;        rectCoords[ 1 ] = lightPos - halfWidth - halfHeight;
        rectCoords[ 2 ] = lightPos - halfWidth + halfHeight;
        rectCoords[ 3 ] = lightPos + halfWidth + halfHeight;
        vec2 uv = LTC_Uv( normal, viewDir, roughness );
        vec4 t1 = texture2D( ltc_1, uv );
        vec4 t2 = texture2D( ltc_2, uv );
        mat3 mInv = mat3(
            vec3( t1.x, 0, t1.y ),
            vec3(    0, 1,    0 ),
            vec3( t1.z, 0, t1.w )
        );
        vec3 fresnel = ( material.specularColor * t2.x + ( vec3( 1.0 ) - material.specularColor ) * t2.y );
        reflectedLight.directSpecular += lightColor * fresnel * LTC_Evaluate( normal, viewDir, position, mInv, rectCoords );
        reflectedLight.directDiffuse += lightColor * material.diffuseColor * LTC_Evaluate( normal, viewDir, position, mat3( 1.0 ), rectCoords );
    }
#endif
void RE_Direct_Physical( const in IncidentLight directLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {
    float dotNL = saturate( dot( geometry.normal, directLight.direction ) );
    vec3 irradiance = dotNL * directLight.color;
    #ifdef USE_CLEARCOAT
        float dotNLcc = saturate( dot( geometry.clearcoatNormal, directLight.direction ) );
        vec3 ccIrradiance = dotNLcc * directLight.color;
        clearcoatSpecular += ccIrradiance * BRDF_GGX( directLight.direction, geometry.viewDir, geometry.clearcoatNormal, material.clearcoatF0, material.clearcoatF90, material.clearcoatRoughness );
    #endif
    #ifdef USE_SHEEN
        sheenSpecular += irradiance * BRDF_Sheen( directLight.direction, geometry.viewDir, geometry.normal, material.sheenColor, material.sheenRoughness );
    #endif
    #ifdef USE_IRIDESCENCE
        reflectedLight.directSpecular += irradiance * BRDF_GGX_Iridescence( directLight.direction, geometry.viewDir, geometry.normal, material.specularColor, material.specularF90, material.iridescence, material.iridescenceFresnel, material.roughness );
    #else
        reflectedLight.directSpecular += irradiance * BRDF_GGX( directLight.direction, geometry.viewDir, geometry.normal, material.specularColor, material.specularF90, material.roughness );
    #endif
    reflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );
}
void RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {
    reflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );
}
void RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 irradiance, const in vec3 clearcoatRadiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight) {
    #ifdef USE_CLEARCOAT
        clearcoatSpecular += clearcoatRadiance * EnvironmentBRDF( geometry.clearcoatNormal, geometry.viewDir, material.clearcoatF0, material.clearcoatF90, material.clearcoatRoughness );
    #endif
    #ifdef USE_SHEEN
        sheenSpecular += irradiance * material.sheenColor * IBLSheenBRDF( geometry.normal, geometry.viewDir, material.sheenRoughness );
    #endif
    vec3 singleScattering = vec3( 0.0 );
    vec3 multiScattering = vec3( 0.0 );
    vec3 cosineWeightedIrradiance = irradiance * RECIPROCAL_PI;
    #ifdef USE_IRIDESCENCE
        computeMultiscatteringIridescence( geometry.normal, geometry.viewDir, material.specularColor, material.specularF90, material.iridescence, material.iridescenceFresnel, material.roughness, singleScattering, multiScattering );
    #else
        computeMultiscattering( geometry.normal, geometry.viewDir, material.specularColor, material.specularF90, material.roughness, singleScattering, multiScattering );
    #endif
    vec3 totalScattering = singleScattering + multiScattering;
    vec3 diffuse = material.diffuseColor * ( 1.0 - max( max( totalScattering.r, totalScattering.g ), totalScattering.b ) );
    reflectedLight.indirectSpecular += radiance * singleScattering;
    reflectedLight.indirectSpecular += multiScattering * cosineWeightedIrradiance;
    reflectedLight.indirectDiffuse += diffuse * cosineWeightedIrradiance;
}
#define RE_Direct                RE_Direct_Physical
#define RE_Direct_RectArea        RE_Direct_RectArea_Physical
#define RE_IndirectDiffuse        RE_IndirectDiffuse_Physical
#define RE_IndirectSpecular        RE_IndirectSpecular_Physical
float computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {
    return saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );
}
//lights_physical_pars_fragment end


//transmission_pars_fragment begin
#ifdef USE_TRANSMISSION
    uniform float transmission;
    uniform float thickness;
    uniform float attenuationDistance;
    uniform vec3 attenuationColor;
    #ifdef USE_TRANSMISSIONMAP
        uniform sampler2D transmissionMap;
    #endif
    #ifdef USE_THICKNESSMAP
        uniform sampler2D thicknessMap;
    #endif
    uniform vec2 transmissionSamplerSize;
    uniform sampler2D transmissionSamplerMap;
    uniform mat4 modelMatrix;
    uniform mat4 projectionMatrix;
    varying vec3 vWorldPosition;
    vec3 getVolumeTransmissionRay( const in vec3 n, const in vec3 v, const in float thickness, const in float ior, const in mat4 modelMatrix ) {
        vec3 refractionVector = refract( - v, normalize( n ), 1.0 / ior );
        vec3 modelScale;
        modelScale.x = length( vec3( modelMatrix[ 0 ].xyz ) );
        modelScale.y = length( vec3( modelMatrix[ 1 ].xyz ) );
        modelScale.z = length( vec3( modelMatrix[ 2 ].xyz ) );
        return normalize( refractionVector ) * thickness * modelScale;
    }
    float applyIorToRoughness( const in float roughness, const in float ior ) {
        return roughness * clamp( ior * 2.0 - 2.0, 0.0, 1.0 );
    }
    vec4 getTransmissionSample( const in vec2 fragCoord, const in float roughness, const in float ior ) {
        float framebufferLod = log2( transmissionSamplerSize.x ) * applyIorToRoughness( roughness, ior );
        #ifdef texture2DLodEXT
            return texture2DLodEXT( transmissionSamplerMap, fragCoord.xy, framebufferLod );
        #else
            return texture2D( transmissionSamplerMap, fragCoord.xy, framebufferLod );
        #endif
    }
    vec3 applyVolumeAttenuation( const in vec3 radiance, const in float transmissionDistance, const in vec3 attenuationColor, const in float attenuationDistance ) {
        if ( attenuationDistance == 0.0 ) {
            return radiance;
        } else {
            vec3 attenuationCoefficient = -log( attenuationColor ) / attenuationDistance;
            vec3 transmittance = exp( - attenuationCoefficient * transmissionDistance );            return transmittance * radiance;
        }
    }
    vec4 getIBLVolumeRefraction( const in vec3 n, const in vec3 v, const in float roughness, const in vec3 diffuseColor,
        const in vec3 specularColor, const in float specularF90, const in vec3 position, const in mat4 modelMatrix,
        const in mat4 viewMatrix, const in mat4 projMatrix, const in float ior, const in float thickness,
        const in vec3 attenuationColor, const in float attenuationDistance ) {
        vec3 transmissionRay = getVolumeTransmissionRay( n, v, thickness, ior, modelMatrix );
        vec3 refractedRayExit = position + transmissionRay;
        vec4 ndcPos = projMatrix * viewMatrix * vec4( refractedRayExit, 1.0 );
        vec2 refractionCoords = ndcPos.xy / ndcPos.w;
        refractionCoords += 1.0;
        refractionCoords /= 2.0;
        vec4 transmittedLight = getTransmissionSample( refractionCoords, roughness, ior );
        vec3 attenuatedColor = applyVolumeAttenuation( transmittedLight.rgb, length( transmissionRay ), attenuationColor, attenuationDistance );
        vec3 F = EnvironmentBRDF( n, v, specularColor, specularF90, roughness );
        return vec4( ( 1.0 - F ) * attenuatedColor * diffuseColor, transmittedLight.a );
    }
#endif
//transmission_pars_fragment end


//shadowmap_pars_fragment begin
#if 0 > 0
  varying vec4 vSpotLightCoord[ 0 ];
#endif
#if 0 > 0
  uniform sampler2D spotLightMap[ 0 ];
#endif
#ifdef USE_SHADOWMAP
    #if 0 > 0
        uniform sampler2D directionalShadowMap[ 0 ];
        varying vec4 vDirectionalShadowCoord[ 0 ];
        struct DirectionalLightShadow {
            float shadowBias;
            float shadowNormalBias;
            float shadowRadius;
            vec2 shadowMapSize;
        };
        uniform DirectionalLightShadow directionalLightShadows[ 0 ];
    #endif
    #if 0 > 0
        uniform sampler2D spotShadowMap[ 0 ];
        struct SpotLightShadow {
            float shadowBias;
            float shadowNormalBias;
            float shadowRadius;
            vec2 shadowMapSize;
        };
        uniform SpotLightShadow spotLightShadows[ 0 ];
    #endif
    #if 0 > 0
        uniform sampler2D pointShadowMap[ 0 ];
        varying vec4 vPointShadowCoord[ 0 ];
        struct PointLightShadow {
            float shadowBias;
            float shadowNormalBias;
            float shadowRadius;
            vec2 shadowMapSize;
            float shadowCameraNear;
            float shadowCameraFar;
        };
        uniform PointLightShadow pointLightShadows[ 0 ];
    #endif
    float texture2DCompare( sampler2D depths, vec2 uv, float compare ) {
        return step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );
    }
    vec2 texture2DDistribution( sampler2D shadow, vec2 uv ) {
        return unpackRGBATo2Half( texture2D( shadow, uv ) );
    }
    float VSMShadow (sampler2D shadow, vec2 uv, float compare ){
        float occlusion = 1.0;
        vec2 distribution = texture2DDistribution( shadow, uv );
        float hard_shadow = step( compare , distribution.x );
        if (hard_shadow != 1.0 ) {
            float distance = compare - distribution.x ;
            float variance = max( 0.00000, distribution.y * distribution.y );
            float softness_probability = variance / (variance + distance * distance );            softness_probability = clamp( ( softness_probability - 0.3 ) / ( 0.95 - 0.3 ), 0.0, 1.0 );            occlusion = clamp( max( hard_shadow, softness_probability ), 0.0, 1.0 );
        }
        return occlusion;
    }
    float getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {
        float shadow = 1.0;
        shadowCoord.xyz /= shadowCoord.w;
        shadowCoord.z += shadowBias;
        bvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );
        bool inFrustum = all( inFrustumVec );
        bvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );
        bool frustumTest = all( frustumTestVec );
        if ( frustumTest ) {
        #if defined( SHADOWMAP_TYPE_PCF )
            vec2 texelSize = vec2( 1.0 ) / shadowMapSize;
            float dx0 = - texelSize.x * shadowRadius;
            float dy0 = - texelSize.y * shadowRadius;
            float dx1 = + texelSize.x * shadowRadius;
            float dy1 = + texelSize.y * shadowRadius;
            float dx2 = dx0 / 2.0;
            float dy2 = dy0 / 2.0;
            float dx3 = dx1 / 2.0;
            float dy3 = dy1 / 2.0;
            shadow = (
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy2 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy2 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy2 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, 0.0 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, 0.0 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy3 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy3 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy3 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )
            ) * ( 1.0 / 17.0 );
        #elif defined( SHADOWMAP_TYPE_PCF_SOFT )
            vec2 texelSize = vec2( 1.0 ) / shadowMapSize;
            float dx = texelSize.x;
            float dy = texelSize.y;
            vec2 uv = shadowCoord.xy;
            vec2 f = fract( uv * shadowMapSize + 0.5 );
            uv -= f * texelSize;
            shadow = (
                texture2DCompare( shadowMap, uv, shadowCoord.z ) +
                texture2DCompare( shadowMap, uv + vec2( dx, 0.0 ), shadowCoord.z ) +
                texture2DCompare( shadowMap, uv + vec2( 0.0, dy ), shadowCoord.z ) +
                texture2DCompare( shadowMap, uv + texelSize, shadowCoord.z ) +
                mix( texture2DCompare( shadowMap, uv + vec2( -dx, 0.0 ), shadowCoord.z ),
                     texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 0.0 ), shadowCoord.z ),
                     f.x ) +
                mix( texture2DCompare( shadowMap, uv + vec2( -dx, dy ), shadowCoord.z ),
                     texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, dy ), shadowCoord.z ),
                     f.x ) +
                mix( texture2DCompare( shadowMap, uv + vec2( 0.0, -dy ), shadowCoord.z ),
                     texture2DCompare( shadowMap, uv + vec2( 0.0, 2.0 * dy ), shadowCoord.z ),
                     f.y ) +
                mix( texture2DCompare( shadowMap, uv + vec2( dx, -dy ), shadowCoord.z ),
                     texture2DCompare( shadowMap, uv + vec2( dx, 2.0 * dy ), shadowCoord.z ),
                     f.y ) +
                mix( mix( texture2DCompare( shadowMap, uv + vec2( -dx, -dy ), shadowCoord.z ),
                          texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, -dy ), shadowCoord.z ),
                          f.x ),
                     mix( texture2DCompare( shadowMap, uv + vec2( -dx, 2.0 * dy ), shadowCoord.z ),
                          texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 2.0 * dy ), shadowCoord.z ),
                          f.x ),
                     f.y )
            ) * ( 1.0 / 9.0 );
        #elif defined( SHADOWMAP_TYPE_VSM )
            shadow = VSMShadow( shadowMap, shadowCoord.xy, shadowCoord.z );
        #else
            shadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );
        #endif
        }
        return shadow;
    }
    vec2 cubeToUV( vec3 v, float texelSizeY ) {
        vec3 absV = abs( v );
        float scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );
        absV *= scaleToCube;
        v *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );
        vec2 planar = v.xy;
        float almostATexel = 1.5 * texelSizeY;
        float almostOne = 1.0 - almostATexel;
        if ( absV.z >= almostOne ) {
            if ( v.z > 0.0 )
                planar.x = 4.0 - v.x;
        } else if ( absV.x >= almostOne ) {
            float signX = sign( v.x );
            planar.x = v.z * signX + 2.0 * signX;
        } else if ( absV.y >= almostOne ) {
            float signY = sign( v.y );
            planar.x = v.x + 2.0 * signY + 2.0;
            planar.y = v.z * signY - 2.0;
        }
        return vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );
    }
    float getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {
        vec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );
        vec3 lightToPosition = shadowCoord.xyz;
        float dp = ( length( lightToPosition ) - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear );        dp += shadowBias;
        vec3 bd3D = normalize( lightToPosition );
        #if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT ) || defined( SHADOWMAP_TYPE_VSM )
            vec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;
            return (
                texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +
                texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +
                texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +
                texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +
                texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +
                texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +
                texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +
                texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +
                texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )
            ) * ( 1.0 / 9.0 );
        #else
            return texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );
        #endif
    }
#endif
//shadowmap_pars_fragment end


//bumpmap_pars_fragment begin
#ifdef USE_BUMPMAP
    uniform sampler2D bumpMap;
    uniform float bumpScale;
    vec2 dHdxy_fwd() {
        vec2 dSTdx = dFdx( vUv );
        vec2 dSTdy = dFdy( vUv );
        float Hll = bumpScale * texture2D( bumpMap, vUv ).x;
        float dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;
        float dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;
        return vec2( dBx, dBy );
    }
    vec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy, float faceDirection ) {
        vec3 vSigmaX = dFdx( surf_pos.xyz );
        vec3 vSigmaY = dFdy( surf_pos.xyz );
        vec3 vN = surf_norm;
        vec3 R1 = cross( vSigmaY, vN );
        vec3 R2 = cross( vN, vSigmaX );
        float fDet = dot( vSigmaX, R1 ) * faceDirection;
        vec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );
        return normalize( abs( fDet ) * surf_norm - vGrad );
    }
#endif
//bumpmap_pars_fragment end


//normalmap_pars_fragment begin
#ifdef USE_NORMALMAP
    uniform sampler2D normalMap;
    uniform vec2 normalScale;
#endif
#ifdef OBJECTSPACE_NORMALMAP
    uniform mat3 normalMatrix;
#endif
#if ! defined ( USE_TANGENT ) && ( defined ( TANGENTSPACE_NORMALMAP ) || defined ( USE_CLEARCOAT_NORMALMAP ) )
    vec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm, vec3 mapN, float faceDirection ) {
        vec3 q0 = dFdx( eye_pos.xyz );
        vec3 q1 = dFdy( eye_pos.xyz );
        vec2 st0 = dFdx( vUv.st );
        vec2 st1 = dFdy( vUv.st );
        vec3 N = surf_norm;
        vec3 q1perp = cross( q1, N );
        vec3 q0perp = cross( N, q0 );
        vec3 T = q1perp * st0.x + q0perp * st1.x;
        vec3 B = q1perp * st0.y + q0perp * st1.y;
        float det = max( dot( T, T ), dot( B, B ) );
        float scale = ( det == 0.0 ) ? 0.0 : faceDirection * inversesqrt( det );
        return normalize( T * ( mapN.x * scale ) + B * ( mapN.y * scale ) + N * mapN.z );
    }
#endif
//normalmap_pars_fragment end


//clearcoat_pars_fragment begin
#ifdef USE_CLEARCOATMAP
    uniform sampler2D clearcoatMap;
#endif
#ifdef USE_CLEARCOAT_ROUGHNESSMAP
    uniform sampler2D clearcoatRoughnessMap;
#endif
#ifdef USE_CLEARCOAT_NORMALMAP
    uniform sampler2D clearcoatNormalMap;
    uniform vec2 clearcoatNormalScale;
#endif
//clearcoat_pars_fragment end


//iridescence_pars_fragment begin
#ifdef USE_IRIDESCENCEMAP
    uniform sampler2D iridescenceMap;
#endif
#ifdef USE_IRIDESCENCE_THICKNESSMAP
    uniform sampler2D iridescenceThicknessMap;
#endif
//iridescence_pars_fragment end


//roughnessmap_pars_fragment begin
#ifdef USE_ROUGHNESSMAP
    uniform sampler2D roughnessMap;
#endif
//roughnessmap_pars_fragment end


//metalnessmap_pars_fragment begin
#ifdef USE_METALNESSMAP
    uniform sampler2D metalnessMap;
#endif
//metalnessmap_pars_fragment end


//logdepthbuf_pars_fragment begin
#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )
    uniform float logDepthBufFC;
    varying float vFragDepth;
    varying float vIsPerspective;
#endif
//logdepthbuf_pars_fragment end


//clipping_planes_pars_fragment begin
#if 0 > 0
    varying vec3 vClipPosition;
    uniform vec4 clippingPlanes[ 0 ];
#endif
//clipping_planes_pars_fragment end

void main() {

//clipping_planes_fragment begin
#if 0 > 0
    vec4 plane;
    
    #if 0 < 0
        bool clipped = true;
        
        if ( clipped ) discard;
    #endif
#endif
//clipping_planes_fragment end

    vec4 diffuseColor = vec4( diffuse, opacity );
    ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
    vec3 totalEmissiveRadiance = emissive;

//logdepthbuf_fragment begin
#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )
    gl_FragDepthEXT = vIsPerspective == 0.0 ? gl_FragCoord.z : log2( vFragDepth ) * logDepthBufFC * 0.5;
#endif
//logdepthbuf_fragment end


//map_fragment begin
#ifdef USE_MAP
    vec4 sampledDiffuseColor = texture2D( map, vUv );
    #ifdef DECODE_VIDEO_TEXTURE
        sampledDiffuseColor = vec4( mix( pow( sampledDiffuseColor.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), sampledDiffuseColor.rgb * 0.0773993808, vec3( lessThanEqual( sampledDiffuseColor.rgb, vec3( 0.04045 ) ) ) ), sampledDiffuseColor.w );
    #endif
    diffuseColor *= sampledDiffuseColor;
#endif
//map_fragment end


//color_fragment begin
#if defined( USE_COLOR_ALPHA )
    diffuseColor *= vColor;
#elif defined( USE_COLOR )
    diffuseColor.rgb *= vColor;
#endif
//color_fragment end


//alphamap_fragment begin
#ifdef USE_ALPHAMAP
    diffuseColor.a *= texture2D( alphaMap, vUv ).g;
#endif
//alphamap_fragment end


//alphatest_fragment begin
#ifdef USE_ALPHATEST
    if ( diffuseColor.a < alphaTest ) discard;
#endif
//alphatest_fragment end


//roughnessmap_fragment begin
float roughnessFactor = roughness;
#ifdef USE_ROUGHNESSMAP
    vec4 texelRoughness = texture2D( roughnessMap, vUv );
    roughnessFactor *= texelRoughness.g;
#endif
//roughnessmap_fragment end


//metalnessmap_fragment begin
float metalnessFactor = metalness;
#ifdef USE_METALNESSMAP
    vec4 texelMetalness = texture2D( metalnessMap, vUv );
    metalnessFactor *= texelMetalness.b;
#endif
//metalnessmap_fragment end


//normal_fragment_begin begin
float faceDirection = gl_FrontFacing ? 1.0 : - 1.0;
#ifdef FLAT_SHADED
    vec3 fdx = dFdx( vViewPosition );
    vec3 fdy = dFdy( vViewPosition );
    vec3 normal = normalize( cross( fdx, fdy ) );
#else
    vec3 normal = normalize( vNormal );
    #ifdef DOUBLE_SIDED
        normal = normal * faceDirection;
    #endif
    #ifdef USE_TANGENT
        vec3 tangent = normalize( vTangent );
        vec3 bitangent = normalize( vBitangent );
        #ifdef DOUBLE_SIDED
            tangent = tangent * faceDirection;
            bitangent = bitangent * faceDirection;
        #endif
        #if defined( TANGENTSPACE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP )
            mat3 vTBN = mat3( tangent, bitangent, normal );
        #endif
    #endif
#endif
vec3 geometryNormal = normal;
//normal_fragment_begin end


//normal_fragment_maps begin
#ifdef OBJECTSPACE_NORMALMAP
    normal = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;
    #ifdef FLIP_SIDED
        normal = - normal;
    #endif
    #ifdef DOUBLE_SIDED
        normal = normal * faceDirection;
    #endif
    normal = normalize( normalMatrix * normal );
#elif defined( TANGENTSPACE_NORMALMAP )
    vec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;
    mapN.xy *= normalScale;
    #ifdef USE_TANGENT
        normal = normalize( vTBN * mapN );
    #else
        normal = perturbNormal2Arb( - vViewPosition, normal, mapN, faceDirection );
    #endif
#elif defined( USE_BUMPMAP )
    normal = perturbNormalArb( - vViewPosition, normal, dHdxy_fwd(), faceDirection );
#endif
//normal_fragment_maps end


//clearcoat_normal_fragment_begin begin
#ifdef USE_CLEARCOAT
    vec3 clearcoatNormal = geometryNormal;
#endif
//clearcoat_normal_fragment_begin end


//clearcoat_normal_fragment_maps begin
#ifdef USE_CLEARCOAT_NORMALMAP
    vec3 clearcoatMapN = texture2D( clearcoatNormalMap, vUv ).xyz * 2.0 - 1.0;
    clearcoatMapN.xy *= clearcoatNormalScale;
    #ifdef USE_TANGENT
        clearcoatNormal = normalize( vTBN * clearcoatMapN );
    #else
        clearcoatNormal = perturbNormal2Arb( - vViewPosition, clearcoatNormal, clearcoatMapN, faceDirection );
    #endif
#endif
//clearcoat_normal_fragment_maps end


//emissivemap_fragment begin
#ifdef USE_EMISSIVEMAP
    vec4 emissiveColor = texture2D( emissiveMap, vUv );
    totalEmissiveRadiance *= emissiveColor.rgb;
#endif
//emissivemap_fragment end


//lights_physical_fragment begin
PhysicalMaterial material;
material.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );
vec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );
float geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );
material.roughness = max( roughnessFactor, 0.0525 );material.roughness += geometryRoughness;
material.roughness = min( material.roughness, 1.0 );
#ifdef IOR
    material.ior = ior;
    #ifdef SPECULAR
        float specularIntensityFactor = specularIntensity;
        vec3 specularColorFactor = specularColor;
        #ifdef USE_SPECULARINTENSITYMAP
            specularIntensityFactor *= texture2D( specularIntensityMap, vUv ).a;
        #endif
        #ifdef USE_SPECULARCOLORMAP
            specularColorFactor *= texture2D( specularColorMap, vUv ).rgb;
        #endif
        material.specularF90 = mix( specularIntensityFactor, 1.0, metalnessFactor );
    #else
        float specularIntensityFactor = 1.0;
        vec3 specularColorFactor = vec3( 1.0 );
        material.specularF90 = 1.0;
    #endif
    material.specularColor = mix( min( pow2( ( material.ior - 1.0 ) / ( material.ior + 1.0 ) ) * specularColorFactor, vec3( 1.0 ) ) * specularIntensityFactor, diffuseColor.rgb, metalnessFactor );
#else
    material.specularColor = mix( vec3( 0.04 ), diffuseColor.rgb, metalnessFactor );
    material.specularF90 = 1.0;
#endif
#ifdef USE_CLEARCOAT
    material.clearcoat = clearcoat;
    material.clearcoatRoughness = clearcoatRoughness;
    material.clearcoatF0 = vec3( 0.04 );
    material.clearcoatF90 = 1.0;
    #ifdef USE_CLEARCOATMAP
        material.clearcoat *= texture2D( clearcoatMap, vUv ).x;
    #endif
    #ifdef USE_CLEARCOAT_ROUGHNESSMAP
        material.clearcoatRoughness *= texture2D( clearcoatRoughnessMap, vUv ).y;
    #endif
    material.clearcoat = saturate( material.clearcoat );    material.clearcoatRoughness = max( material.clearcoatRoughness, 0.0525 );
    material.clearcoatRoughness += geometryRoughness;
    material.clearcoatRoughness = min( material.clearcoatRoughness, 1.0 );
#endif
#ifdef USE_IRIDESCENCE
    material.iridescence = iridescence;
    material.iridescenceIOR = iridescenceIOR;
    #ifdef USE_IRIDESCENCEMAP
        material.iridescence *= texture2D( iridescenceMap, vUv ).r;
    #endif
    #ifdef USE_IRIDESCENCE_THICKNESSMAP
        material.iridescenceThickness = (iridescenceThicknessMaximum - iridescenceThicknessMinimum) * texture2D( iridescenceThicknessMap, vUv ).g + iridescenceThicknessMinimum;
    #else
        material.iridescenceThickness = iridescenceThicknessMaximum;
    #endif
#endif
#ifdef USE_SHEEN
    material.sheenColor = sheenColor;
    #ifdef USE_SHEENCOLORMAP
        material.sheenColor *= texture2D( sheenColorMap, vUv ).rgb;
    #endif
    material.sheenRoughness = clamp( sheenRoughness, 0.07, 1.0 );
    #ifdef USE_SHEENROUGHNESSMAP
        material.sheenRoughness *= texture2D( sheenRoughnessMap, vUv ).a;
    #endif
#endif
//lights_physical_fragment end


//lights_fragment_begin begin

GeometricContext geometry;
geometry.position = - vViewPosition;
geometry.normal = normal;
geometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( vViewPosition );
#ifdef USE_CLEARCOAT
    geometry.clearcoatNormal = clearcoatNormal;
#endif
#ifdef USE_IRIDESCENCE
    float dotNVi = saturate( dot( normal, geometry.viewDir ) );
    if ( material.iridescenceThickness == 0.0 ) {
        material.iridescence = 0.0;
    } else {
        material.iridescence = saturate( material.iridescence );
    }
    if ( material.iridescence > 0.0 ) {
        material.iridescenceFresnel = evalIridescence( 1.0, material.iridescenceIOR, dotNVi, material.iridescenceThickness, material.specularColor );
        material.iridescenceF0 = Schlick_to_F0( material.iridescenceFresnel, 1.0, dotNVi );
    }
#endif
IncidentLight directLight;
#if ( 0 > 0 ) && defined( RE_Direct )
    PointLight pointLight;
    #if defined( USE_SHADOWMAP ) && 0 > 0
    PointLightShadow pointLightShadow;
    #endif
    
#endif
#if ( 0 > 0 ) && defined( RE_Direct )
    SpotLight spotLight;
    vec4 spotColor;
    vec3 spotLightCoord;
    bool inSpotLightMap;
    #if defined( USE_SHADOWMAP ) && 0 > 0
    SpotLightShadow spotLightShadow;
    #endif
    
#endif
#if ( 0 > 0 ) && defined( RE_Direct )
    DirectionalLight directionalLight;
    #if defined( USE_SHADOWMAP ) && 0 > 0
    DirectionalLightShadow directionalLightShadow;
    #endif
    
#endif
#if ( 0 > 0 ) && defined( RE_Direct_RectArea )
    RectAreaLight rectAreaLight;
    
#endif
#if defined( RE_IndirectDiffuse )
    vec3 iblIrradiance = vec3( 0.0 );
    vec3 irradiance = getAmbientLightIrradiance( ambientLightColor );
    irradiance += getLightProbeIrradiance( lightProbe, geometry.normal );
    #if ( 1 > 0 )
        
            irradiance += getHemisphereLightIrradiance( hemisphereLights[ 0 ], geometry.normal );
        
    #endif
#endif
#if defined( RE_IndirectSpecular )
    vec3 radiance = vec3( 0.0 );
    vec3 clearcoatRadiance = vec3( 0.0 );
#endif
//lights_fragment_begin end


//lights_fragment_maps begin
#if defined( RE_IndirectDiffuse )
    #ifdef USE_LIGHTMAP
        vec4 lightMapTexel = texture2D( lightMap, vUv2 );
        vec3 lightMapIrradiance = lightMapTexel.rgb * lightMapIntensity;
        irradiance += lightMapIrradiance;
    #endif
    #if defined( USE_ENVMAP ) && defined( STANDARD ) && defined( ENVMAP_TYPE_CUBE_UV )
        iblIrradiance += getIBLIrradiance( geometry.normal );
    #endif
#endif
#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )
    radiance += getIBLRadiance( geometry.viewDir, geometry.normal, material.roughness );
    #ifdef USE_CLEARCOAT
        clearcoatRadiance += getIBLRadiance( geometry.viewDir, geometry.clearcoatNormal, material.clearcoatRoughness );
    #endif
#endif
//lights_fragment_maps end


//lights_fragment_end begin
#if defined( RE_IndirectDiffuse )
    RE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );
#endif
#if defined( RE_IndirectSpecular )
    RE_IndirectSpecular( radiance, iblIrradiance, clearcoatRadiance, geometry, material, reflectedLight );
#endif
//lights_fragment_end end


//aomap_fragment begin
#ifdef USE_AOMAP
    float ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;
    reflectedLight.indirectDiffuse *= ambientOcclusion;
    #if defined( USE_ENVMAP ) && defined( STANDARD )
        float dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );
        reflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.roughness );
    #endif
#endif
//aomap_fragment end

    vec3 totalDiffuse = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse;
    vec3 totalSpecular = reflectedLight.directSpecular + reflectedLight.indirectSpecular;

//transmission_fragment begin
#ifdef USE_TRANSMISSION
    material.transmission = transmission;
    material.transmissionAlpha = 1.0;
    material.thickness = thickness;
    material.attenuationDistance = attenuationDistance;
    material.attenuationColor = attenuationColor;
    #ifdef USE_TRANSMISSIONMAP
        material.transmission *= texture2D( transmissionMap, vUv ).r;
    #endif
    #ifdef USE_THICKNESSMAP
        material.thickness *= texture2D( thicknessMap, vUv ).g;
    #endif
    vec3 pos = vWorldPosition;
    vec3 v = normalize( cameraPosition - pos );
    vec3 n = inverseTransformDirection( normal, viewMatrix );
    vec4 transmission = getIBLVolumeRefraction(
        n, v, material.roughness, material.diffuseColor, material.specularColor, material.specularF90,
        pos, modelMatrix, viewMatrix, projectionMatrix, material.ior, material.thickness,
        material.attenuationColor, material.attenuationDistance );
    material.transmissionAlpha = mix( material.transmissionAlpha, transmission.a, material.transmission );
    totalDiffuse = mix( totalDiffuse, transmission.rgb, material.transmission );
#endif
//transmission_fragment end

    vec3 outgoingLight = totalDiffuse + totalSpecular + totalEmissiveRadiance;
    #ifdef USE_SHEEN
        float sheenEnergyComp = 1.0 - 0.157 * max3( material.sheenColor );
        outgoingLight = outgoingLight * sheenEnergyComp + sheenSpecular;
    #endif
    #ifdef USE_CLEARCOAT
        float dotNVcc = saturate( dot( geometry.clearcoatNormal, geometry.viewDir ) );
        vec3 Fcc = F_Schlick( material.clearcoatF0, material.clearcoatF90, dotNVcc );
        outgoingLight = outgoingLight * ( 1.0 - material.clearcoat * Fcc ) + clearcoatSpecular * material.clearcoat;
    #endif

//output_fragment begin
#ifdef OPAQUE
diffuseColor.a = 1.0;
#endif
#ifdef USE_TRANSMISSION
diffuseColor.a *= material.transmissionAlpha + 0.1;
#endif
gl_FragColor = vec4( outgoingLight, diffuseColor.a );
//output_fragment end


//tonemapping_fragment begin
#if defined( TONE_MAPPING )
    gl_FragColor.rgb = toneMapping( gl_FragColor.rgb );
#endif
//tonemapping_fragment end


//encodings_fragment begin
gl_FragColor = linearToOutputTexel( gl_FragColor );
//encodings_fragment end


//fog_fragment begin
#ifdef USE_FOG
    #ifdef FOG_EXP2
        float fogFactor = 1.0 - exp( - fogDensity * fogDensity * vFogDepth * vFogDepth );
    #else
        float fogFactor = smoothstep( fogNear, fogFar, vFogDepth );
    #endif
    gl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );
#endif
//fog_fragment end


//premultiplied_alpha_fragment begin
#ifdef PREMULTIPLIED_ALPHA
    gl_FragColor.rgb *= gl_FragColor.a;
#endif
//premultiplied_alpha_fragment end


//dithering_fragment begin
#ifdef DITHERING
    gl_FragColor.rgb = dithering( gl_FragColor.rgb );
#endif
//dithering_fragment end

}

vertex.glsl

//VERTEX
#define STANDARD
varying vec3 vViewPosition;
#ifdef USE_TRANSMISSION
    varying vec3 vWorldPosition;
#endif

//common begin
#define PI 3.141592653589793
#define PI2 6.283185307179586
#define PI_HALF 1.5707963267948966
#define RECIPROCAL_PI 0.3183098861837907
#define RECIPROCAL_PI2 0.15915494309189535
#define EPSILON 1e-6
#ifndef saturate
#define saturate( a ) clamp( a, 0.0, 1.0 )
#endif
#define whiteComplement( a ) ( 1.0 - saturate( a ) )
float pow2( const in float x ) { return x*x; }
vec3 pow2( const in vec3 x ) { return x*x; }
float pow3( const in float x ) { return x*x*x; }
float pow4( const in float x ) { float x2 = x*x; return x2*x2; }
float max3( const in vec3 v ) { return max( max( v.x, v.y ), v.z ); }
float average( const in vec3 v ) { return dot( v, vec3( 0.3333333 ) ); }
highp float rand( const in vec2 uv ) {
    const highp float a = 12.9898, b = 78.233, c = 43758.5453;
    highp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );
    return fract( sin( sn ) * c );
}
#ifdef HIGH_PRECISION
    float precisionSafeLength( vec3 v ) { return length( v ); }
#else
    float precisionSafeLength( vec3 v ) {
        float maxComponent = max3( abs( v ) );
        return length( v / maxComponent ) * maxComponent;
    }
#endif
struct IncidentLight {
    vec3 color;
    vec3 direction;
    bool visible;
};
struct ReflectedLight {
    vec3 directDiffuse;
    vec3 directSpecular;
    vec3 indirectDiffuse;
    vec3 indirectSpecular;
};
struct GeometricContext {
    vec3 position;
    vec3 normal;
    vec3 viewDir;
#ifdef USE_CLEARCOAT
    vec3 clearcoatNormal;
#endif
};
vec3 transformDirection( in vec3 dir, in mat4 matrix ) {
    return normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );
}
vec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {
    return normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );
}
mat3 transposeMat3( const in mat3 m ) {
    mat3 tmp;
    tmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );
    tmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );
    tmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );
    return tmp;
}
float luminance( const in vec3 rgb ) {
    const vec3 weights = vec3( 0.2126729, 0.7151522, 0.0721750 );
    return dot( weights, rgb );
}
bool isPerspectiveMatrix( mat4 m ) {
    return m[ 2 ][ 3 ] == - 1.0;
}
vec2 equirectUv( in vec3 dir ) {
    float u = atan( dir.z, dir.x ) * RECIPROCAL_PI2 + 0.5;
    float v = asin( clamp( dir.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;
    return vec2( u, v );
}
//common end


//uv_pars_vertex begin
#ifdef USE_UV
    #ifdef UVS_VERTEX_ONLY
        vec2 vUv;
    #else
        varying vec2 vUv;
    #endif
    uniform mat3 uvTransform;
#endif
//uv_pars_vertex end


//uv2_pars_vertex begin
#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )
    attribute vec2 uv2;
    varying vec2 vUv2;
    uniform mat3 uv2Transform;
#endif
//uv2_pars_vertex end


//displacementmap_pars_vertex begin
#ifdef USE_DISPLACEMENTMAP
    uniform sampler2D displacementMap;
    uniform float displacementScale;
    uniform float displacementBias;
#endif
//displacementmap_pars_vertex end


//color_pars_vertex begin
#if defined( USE_COLOR_ALPHA )
    varying vec4 vColor;
#elif defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )
    varying vec3 vColor;
#endif
//color_pars_vertex end


//fog_pars_vertex begin
#ifdef USE_FOG
    varying float vFogDepth;
#endif
//fog_pars_vertex end


//normal_pars_vertex begin
#ifndef FLAT_SHADED
    varying vec3 vNormal;
    #ifdef USE_TANGENT
        varying vec3 vTangent;
        varying vec3 vBitangent;
    #endif
#endif
//normal_pars_vertex end


//morphtarget_pars_vertex begin
#ifdef USE_MORPHTARGETS
    uniform float morphTargetBaseInfluence;
    #ifdef MORPHTARGETS_TEXTURE
        uniform float morphTargetInfluences[ MORPHTARGETS_COUNT ];
        uniform sampler2DArray morphTargetsTexture;
        uniform ivec2 morphTargetsTextureSize;
        vec4 getMorph( const in int vertexIndex, const in int morphTargetIndex, const in int offset ) {
            int texelIndex = vertexIndex * MORPHTARGETS_TEXTURE_STRIDE + offset;
            int y = texelIndex / morphTargetsTextureSize.x;
            int x = texelIndex - y * morphTargetsTextureSize.x;
            ivec3 morphUV = ivec3( x, y, morphTargetIndex );
            return texelFetch( morphTargetsTexture, morphUV, 0 );
        }
    #else
        #ifndef USE_MORPHNORMALS
            uniform float morphTargetInfluences[ 8 ];
        #else
            uniform float morphTargetInfluences[ 4 ];
        #endif
    #endif
#endif
//morphtarget_pars_vertex end


//skinning_pars_vertex begin
#ifdef USE_SKINNING
    uniform mat4 bindMatrix;
    uniform mat4 bindMatrixInverse;
    uniform highp sampler2D boneTexture;
    uniform int boneTextureSize;
    mat4 getBoneMatrix( const in float i ) {
        float j = i * 4.0;
        float x = mod( j, float( boneTextureSize ) );
        float y = floor( j / float( boneTextureSize ) );
        float dx = 1.0 / float( boneTextureSize );
        float dy = 1.0 / float( boneTextureSize );
        y = dy * ( y + 0.5 );
        vec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );
        vec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );
        vec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );
        vec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );
        mat4 bone = mat4( v1, v2, v3, v4 );
        return bone;
    }
#endif
//skinning_pars_vertex end


//shadowmap_pars_vertex begin
#if 0 > 0
  uniform mat4 spotLightMatrix[ 0 ];
  varying vec4 vSpotLightCoord[ 0 ];
#endif
#ifdef USE_SHADOWMAP
    #if 0 > 0
        uniform mat4 directionalShadowMatrix[ 0 ];
        varying vec4 vDirectionalShadowCoord[ 0 ];
        struct DirectionalLightShadow {
            float shadowBias;
            float shadowNormalBias;
            float shadowRadius;
            vec2 shadowMapSize;
        };
        uniform DirectionalLightShadow directionalLightShadows[ 0 ];
    #endif
    #if 0 > 0
        struct SpotLightShadow {
            float shadowBias;
            float shadowNormalBias;
            float shadowRadius;
            vec2 shadowMapSize;
        };
        uniform SpotLightShadow spotLightShadows[ 0 ];
    #endif
    #if 0 > 0
        uniform mat4 pointShadowMatrix[ 0 ];
        varying vec4 vPointShadowCoord[ 0 ];
        struct PointLightShadow {
            float shadowBias;
            float shadowNormalBias;
            float shadowRadius;
            vec2 shadowMapSize;
            float shadowCameraNear;
            float shadowCameraFar;
        };
        uniform PointLightShadow pointLightShadows[ 0 ];
    #endif
#endif
//shadowmap_pars_vertex end


//logdepthbuf_pars_vertex begin
#ifdef USE_LOGDEPTHBUF
    #ifdef USE_LOGDEPTHBUF_EXT
        varying float vFragDepth;
        varying float vIsPerspective;
    #else
        uniform float logDepthBufFC;
    #endif
#endif
//logdepthbuf_pars_vertex end


//clipping_planes_pars_vertex begin
#if 0 > 0
    varying vec3 vClipPosition;
#endif
//clipping_planes_pars_vertex end

void main() {

//uv_vertex begin
#ifdef USE_UV
    vUv = ( uvTransform * vec3( uv, 1 ) ).xy;
#endif
//uv_vertex end


//uv2_vertex begin
#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )
    vUv2 = ( uv2Transform * vec3( uv2, 1 ) ).xy;
#endif
//uv2_vertex end


//color_vertex begin
#if defined( USE_COLOR_ALPHA )
    vColor = vec4( 1.0 );
#elif defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )
    vColor = vec3( 1.0 );
#endif
#ifdef USE_COLOR
    vColor *= color;
#endif
#ifdef USE_INSTANCING_COLOR
    vColor.xyz *= instanceColor.xyz;
#endif
//color_vertex end


//morphcolor_vertex begin
#if defined( USE_MORPHCOLORS ) && defined( MORPHTARGETS_TEXTURE )
    vColor *= morphTargetBaseInfluence;
    for ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {
        #if defined( USE_COLOR_ALPHA )
            if ( morphTargetInfluences[ i ] != 0.0 ) vColor += getMorph( gl_VertexID, i, 2 ) * morphTargetInfluences[ i ];
        #elif defined( USE_COLOR )
            if ( morphTargetInfluences[ i ] != 0.0 ) vColor += getMorph( gl_VertexID, i, 2 ).rgb * morphTargetInfluences[ i ];
        #endif
    }
#endif
//morphcolor_vertex end


//beginnormal_vertex begin
vec3 objectNormal = vec3( normal );
#ifdef USE_TANGENT
    vec3 objectTangent = vec3( tangent.xyz );
#endif
//beginnormal_vertex end


//morphnormal_vertex begin
#ifdef USE_MORPHNORMALS
    objectNormal *= morphTargetBaseInfluence;
    #ifdef MORPHTARGETS_TEXTURE
        for ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {
            if ( morphTargetInfluences[ i ] != 0.0 ) objectNormal += getMorph( gl_VertexID, i, 1 ).xyz * morphTargetInfluences[ i ];
        }
    #else
        objectNormal += morphNormal0 * morphTargetInfluences[ 0 ];
        objectNormal += morphNormal1 * morphTargetInfluences[ 1 ];
        objectNormal += morphNormal2 * morphTargetInfluences[ 2 ];
        objectNormal += morphNormal3 * morphTargetInfluences[ 3 ];
    #endif
#endif
//morphnormal_vertex end


//skinbase_vertex begin
#ifdef USE_SKINNING
    mat4 boneMatX = getBoneMatrix( skinIndex.x );
    mat4 boneMatY = getBoneMatrix( skinIndex.y );
    mat4 boneMatZ = getBoneMatrix( skinIndex.z );
    mat4 boneMatW = getBoneMatrix( skinIndex.w );
#endif
//skinbase_vertex end


//skinnormal_vertex begin
#ifdef USE_SKINNING
    mat4 skinMatrix = mat4( 0.0 );
    skinMatrix += skinWeight.x * boneMatX;
    skinMatrix += skinWeight.y * boneMatY;
    skinMatrix += skinWeight.z * boneMatZ;
    skinMatrix += skinWeight.w * boneMatW;
    skinMatrix = bindMatrixInverse * skinMatrix * bindMatrix;
    objectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;
    #ifdef USE_TANGENT
        objectTangent = vec4( skinMatrix * vec4( objectTangent, 0.0 ) ).xyz;
    #endif
#endif
//skinnormal_vertex end


//defaultnormal_vertex begin
vec3 transformedNormal = objectNormal;
#ifdef USE_INSTANCING
    mat3 m = mat3( instanceMatrix );
    transformedNormal /= vec3( dot( m[ 0 ], m[ 0 ] ), dot( m[ 1 ], m[ 1 ] ), dot( m[ 2 ], m[ 2 ] ) );
    transformedNormal = m * transformedNormal;
#endif
transformedNormal = normalMatrix * transformedNormal;
#ifdef FLIP_SIDED
    transformedNormal = - transformedNormal;
#endif
#ifdef USE_TANGENT
    vec3 transformedTangent = ( modelViewMatrix * vec4( objectTangent, 0.0 ) ).xyz;
    #ifdef FLIP_SIDED
        transformedTangent = - transformedTangent;
    #endif
#endif
//defaultnormal_vertex end


//normal_vertex begin
#ifndef FLAT_SHADED
    vNormal = normalize( transformedNormal );
    #ifdef USE_TANGENT
        vTangent = normalize( transformedTangent );
        vBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );
    #endif
#endif
//normal_vertex end


//begin_vertex begin
vec3 transformed = vec3( position );
//begin_vertex end


//morphtarget_vertex begin
#ifdef USE_MORPHTARGETS
    transformed *= morphTargetBaseInfluence;
    #ifdef MORPHTARGETS_TEXTURE
        for ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {
            if ( morphTargetInfluences[ i ] != 0.0 ) transformed += getMorph( gl_VertexID, i, 0 ).xyz * morphTargetInfluences[ i ];
        }
    #else
        transformed += morphTarget0 * morphTargetInfluences[ 0 ];
        transformed += morphTarget1 * morphTargetInfluences[ 1 ];
        transformed += morphTarget2 * morphTargetInfluences[ 2 ];
        transformed += morphTarget3 * morphTargetInfluences[ 3 ];
        #ifndef USE_MORPHNORMALS
            transformed += morphTarget4 * morphTargetInfluences[ 4 ];
            transformed += morphTarget5 * morphTargetInfluences[ 5 ];
            transformed += morphTarget6 * morphTargetInfluences[ 6 ];
            transformed += morphTarget7 * morphTargetInfluences[ 7 ];
        #endif
    #endif
#endif
//morphtarget_vertex end


//skinning_vertex begin
#ifdef USE_SKINNING
    vec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );
    vec4 skinned = vec4( 0.0 );
    skinned += boneMatX * skinVertex * skinWeight.x;
    skinned += boneMatY * skinVertex * skinWeight.y;
    skinned += boneMatZ * skinVertex * skinWeight.z;
    skinned += boneMatW * skinVertex * skinWeight.w;
    transformed = ( bindMatrixInverse * skinned ).xyz;
#endif
//skinning_vertex end


//displacementmap_vertex begin
#ifdef USE_DISPLACEMENTMAP
    transformed += normalize( objectNormal ) * ( texture2D( displacementMap, vUv ).x * displacementScale + displacementBias );
#endif
//displacementmap_vertex end


//project_vertex begin
vec4 mvPosition = vec4( transformed, 1.0 );
#ifdef USE_INSTANCING
    mvPosition = instanceMatrix * mvPosition;
#endif
mvPosition = modelViewMatrix * mvPosition;
gl_Position = projectionMatrix * mvPosition;
//project_vertex end


//logdepthbuf_vertex begin
#ifdef USE_LOGDEPTHBUF
    #ifdef USE_LOGDEPTHBUF_EXT
        vFragDepth = 1.0 + gl_Position.w;
        vIsPerspective = float( isPerspectiveMatrix( projectionMatrix ) );
    #else
        if ( isPerspectiveMatrix( projectionMatrix ) ) {
            gl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;
            gl_Position.z *= gl_Position.w;
        }
    #endif
#endif
//logdepthbuf_vertex end


//clipping_planes_vertex begin
#if 0 > 0
    vClipPosition = - mvPosition.xyz;
#endif
//clipping_planes_vertex end

    vViewPosition = - mvPosition.xyz;

//worldpos_vertex begin
#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP ) || defined ( USE_TRANSMISSION ) || 0 > 0
    vec4 worldPosition = vec4( transformed, 1.0 );    #ifdef USE_INSTANCING
        worldPosition = instanceMatrix * worldPosition;
    #endif
    worldPosition = modelMatrix * worldPosition;
#endif
//worldpos_vertex end


//shadowmap_vertex begin
#if defined( USE_SHADOWMAP ) || ( 0 > 0 )
    #if 0 > 0 || 0 > 0 || 0 > 0
        vec3 shadowWorldNormal = inverseTransformDirection( transformedNormal, viewMatrix );
        vec4 shadowWorldPosition;
    #endif
    #if 0 > 0
    
    #endif
    #if 0 > 0
    
    #endif
    #if 0 > 0
    
    #endif
#endif
//shadowmap_vertex end


//fog_vertex begin
#ifdef USE_FOG
    vFogDepth = - mvPosition.z;
#endif
//fog_vertex end

#ifdef USE_TRANSMISSION
    vWorldPosition = worldPosition.xyz;
#endif
}