透明だけど影を落とすシェーダー

MobileARShadow.shader

//This is based on a shader from https://alastaira.wordpress.com/2014/12/30/adding-shadows-to-a-unity-vertexfragment-shader-in-7-easy-steps/

Shader "Custom/MobileARShadow"
{
    SubShader {
        Pass {
         
            Tags { "LightMode" = "ForwardBase" "RenderType"="Opaque" "Queue"="Geometry+1" "ForceNoShadowCasting"="True"  }
			LOD 150
			Blend Zero SrcColor
			ZWrite On
        
            CGPROGRAM
 
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"
 
            #pragma multi_compile_fwdbase
 
            #include "AutoLight.cginc"
  
            struct v2f
            {
                float4 pos : SV_POSITION;
                LIGHTING_COORDS(0,1)
            };
 
 
            v2f vert(appdata_base v) {
                v2f o;
                o.pos = UnityObjectToClipPos (v.vertex);
                TRANSFER_VERTEX_TO_FRAGMENT(o);
                 
                return o;
            }
 
            fixed4 frag(v2f i) : COLOR {
                float attenuation = LIGHT_ATTENUATION(i);
                return fixed4(1.0,1.0,1.0,1.0) * attenuation;
            }
 
            ENDCG
        }
    }
     
    Fallback "VertexLit"
}