MeshPhysicalMaterial custom

MeshCustomMaterial.js

import vs from "shaders/physicalcustom.vs"
import fs from "shaders/physicalcustom.fs"

export default class MeshCustomMaterial extends THREE.MeshPhysicalMaterial {

	constructor(parameters, uniforms={}){
		super(parameters)

		this.defines = { 'PHYSICAL': '' };

		this.uniforms = THREE.UniformsUtils.merge([
			THREE.ShaderLib.physical.uniforms,
			THREE.ShaderLib.standard.uniforms,
			uniforms
		] )
		
	 	this.setFlags(this)
  	this.setValues(parameters)
		this.isMeshStandardMaterial = true
		this.lights = true
	}
	
	setFlags(material) {
		material.vertexShader = vs;
		material.fragmentShader = fs;
		material.type = 'MeshCustomMaterial';
	}

}

standardcustom.fs

#define PHYSICAL

uniform vec3 diffuse;
uniform vec3 emissive;
uniform float roughness;
uniform float metalness;
uniform float opacity;

#ifndef STANDARD
	uniform float clearCoat;
	uniform float clearCoatRoughness;
#endif

varying vec3 vViewPosition;

#ifndef FLAT_SHADED

	varying vec3 vNormal;

#endif

#include <common>
#include <packing>
#include <dithering_pars_fragment>
#include <color_pars_fragment>
#include <uv_pars_fragment>
#include <uv2_pars_fragment>
#include <map_pars_fragment>
#include <alphamap_pars_fragment>
#include <aomap_pars_fragment>
#include <lightmap_pars_fragment>
#include <emissivemap_pars_fragment>
#include <envmap_pars_fragment>
#include <fog_pars_fragment>
#include <bsdfs>
#include <cube_uv_reflection_fragment>
#include <lights_pars>
#include <lights_physical_pars_fragment>
#include <shadowmap_pars_fragment>
#include <bumpmap_pars_fragment>
#include <normalmap_pars_fragment>
#include <roughnessmap_pars_fragment>
#include <metalnessmap_pars_fragment>
#include <logdepthbuf_pars_fragment>
#include <clipping_planes_pars_fragment>

void main() {

	float flipNormal = 0.;

	#include <clipping_planes_fragment>

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

	#include <logdepthbuf_fragment>
	#include <map_fragment>
	#include <color_fragment>
	#include <alphamap_fragment>
	#include <alphatest_fragment>
	#include <roughnessmap_fragment>
	#include <metalnessmap_fragment>
	#include <normal_fragment>
	#include <emissivemap_fragment>

	// accumulation
	#include <lights_physical_fragment>
	#include <lights_template>

	// modulation
	#include <aomap_fragment>

	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;

	gl_FragColor = vec4( outgoingLight, diffuseColor.a );

	#include <tonemapping_fragment>
	#include <encodings_fragment>
	#include <fog_fragment>
	#include <premultiplied_alpha_fragment>
	#include <dithering_fragment>

}

standardcustom.vs

#define PHYSICAL

varying vec3 vViewPosition;

#ifndef FLAT_SHADED

	varying vec3 vNormal;

#endif

#include <common>
#include <uv_pars_vertex>
#include <uv2_pars_vertex>
#include <displacementmap_pars_vertex>
#include <color_pars_vertex>
#include <fog_pars_vertex>
#include <morphtarget_pars_vertex>
#include <skinning_pars_vertex>
#include <shadowmap_pars_vertex>
#include <logdepthbuf_pars_vertex>
#include <clipping_planes_pars_vertex>

void main() {

	#include <uv_vertex>
	#include <uv2_vertex>
	#include <color_vertex>

	#include <beginnormal_vertex>
	#include <morphnormal_vertex>
	#include <skinbase_vertex>
	#include <skinnormal_vertex>
	#include <defaultnormal_vertex>

#ifndef FLAT_SHADED // Normal computed with derivatives when FLAT_SHADED

	vNormal = normalize( transformedNormal );

#endif

	#include <begin_vertex>

	// MODIFY HERE
	// transformed = transformed + normal * sin(uv.x+uv.y) * 100.;

	#include <morphtarget_vertex>
	#include <skinning_vertex>
	#include <displacementmap_vertex>
	#include <project_vertex>
	#include <logdepthbuf_vertex>
	#include <clipping_planes_vertex>

	vViewPosition = - mvPosition.xyz;

	#include <worldpos_vertex>
	#include <shadowmap_vertex>
	#include <fog_vertex>

}

Just a little fix on the line 49 of the standardcustom.fs: the value for flipNormal should be set to 1. in order to retrieve the normals and have the material reacts to the light.