Edit2: Getting instance's position in shadowmap for uniform shading shader about gpuinstance HOT 5 CLOSED

Shader "Instanced/distantVoxel"
{
	Properties
	{
		_MainTex("Albedo (RGB)", 2D) = "white" {}
	}
	SubShader
	{
		Tags{ "RenderType" = "Opaque" }
		LOD 200

		CGPROGRAM
		// Upgrade NOTE: excluded shader from OpenGL ES 2.0 because it uses non-square matrices
		#pragma exclude_renderers gles
		// Physically based Standard lighting model
		#pragma surface surf Standard addshadow vertex:vert finalcolor:colorOverride
		#pragma instancing_options procedural:setup
		#pragma target 5.0
		#pragma multi_compile_instancing
		//#pragma multi_compile _ _MAIN_LIGHT_SHADOWS
		//#pragma multi_compile _ _MAIN_LIGHT_SHADOWS_CASCADE

		sampler2D _MainTex;
		int sampledColor = 0;
		half4 colorSample;
		half shadow;

		#include "HLSLSupport.cginc"
		#include "UnityShadowLibrary.cginc"
		#include "AutoLight.cginc"
		#include "gpuinstance_includes.cginc"

		struct Input
		{
			float2 uv_MainTex;
			fixed4 color;
			float4 screenPos;
		};

		void setup()
		{
			do_instance_setup();
		}

		void vert(inout appdata_full v, out Input o)
		{
			UNITY_INITIALIZE_OUTPUT(Input, o);
			int id = get_instance_id();
			o.color = get_instance_color(id);
			#if defined (SHADOWS_SCREEN) && !defined(UNITY_NO_SCREENSPACE_SHADOWS) 
			{
				o.screenPos = mul(unity_WorldToShadow[0], mul(unity_ObjectToWorld, v.vertex));
			}
			#endif
		}

		half _DummyZero;

		void surf(Input IN, inout SurfaceOutputStandard o)
		{
			if (sampledColor < 1)
			{
				o.Emission = IN.screenPos.x * _DummyZero * shadow;
				o.Albedo = tex2D(_MainTex, IN.uv_MainTex);
				o.Alpha = 1;
				colorSample = tex2D(_MainTex, IN.uv_MainTex) * IN.color;
				shadow = 1;
				#if defined (SHADOWS_SCREEN) && !defined(UNITY_NO_SCREENSPACE_SHADOWS) 
				{
					shadow = unitySampleShadow(IN.screenPos);
				}
				#endif
			}
		}

		void colorOverride(Input IN, SurfaceOutputStandard o, inout fixed4 color)
		{
			color = colorSample / (1 + shadow);
		}

		ENDCG
	}
	FallBack "Diffuse"
}

Shader "Instanced/voxelFade"
{
	Properties
	{
		_MainTex("Albedo (RGB)", 2D) = "white" {}
		_FadeEnd("Fade End", Color) = (1, 1, 1, 1)
		_FadeRate("Rate of Fade", float) = 0
		_BegDist("Beginning Distance", float) = 0
	}
		SubShader{
		Tags{ "RenderType" = "Opaque" }
		LOD 200

		CGPROGRAM
			// Upgrade NOTE: excluded shader from OpenGL ES 2.0 because it uses non-square matrices
	#pragma exclude_renderers gles
			// Physically based Standard lighting model
	#pragma surface surf Standard addshadow vertex:vert finalcolor:colorOverride
	#pragma instancing_options procedural:setup
	#pragma target 5.0
	#pragma multi_compile_instancing

		sampler2D _MainTex;
		float4 _FadeEnd;
		float _FadeRate;
		float _BegDist;
		float endDistance;

	#include "gpuinstance_includes.cginc"

		struct Input
		{
			float2 uv_MainTex;
			fixed4 color;
		};

		void setup()
		{
		do_instance_setup();
		}

		void vert(inout appdata_full v, out Input o)
		{
		UNITY_INITIALIZE_OUTPUT(Input, o);
		int id = get_instance_id();
		o.color = get_instance_color(id);
		endDistance = distance(_WorldSpaceCameraPos, mul(unity_ObjectToWorld, v.vertex));
		}

		void surf(Input IN, inout SurfaceOutputStandard o)
		{
			fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * IN.color;
			o.Albedo = c.rgb;
			o.Alpha = c.a;
		}

		void colorOverride(Input IN, SurfaceOutputStandard o, inout fixed4 color)
		{
			endDistance = clamp((endDistance - _BegDist) * _FadeRate, 0, 1);
			color = color * (1 - endDistance) + (IN.color * endDistance) * _FadeEnd;
		}

		ENDCG
		}
			FallBack "Diffuse"
}

Shader "Instanced/voxelFade"
{
	Properties
	{
		_MainTex("Albedo (RGB)", 2D) = "white" {}
		_FadeEnd("Fade End", Color) = (1, 1, 1, 1)
		_FadeRate("Rate of Fade", float) = 0
		_BegDist("Beginning Distance", float) = 0
	}
		SubShader{
		Tags{ "RenderType" = "Opaque" }
		LOD 200

		CGPROGRAM
		// Upgrade NOTE: excluded shader from OpenGL ES 2.0 because it uses non-square matrices
		#pragma exclude_renderers gles
		// Physically based Standard lighting model
		#pragma surface surf Standard addshadow vertex:vert finalcolor:colorOverride
		#pragma instancing_options procedural:setup
		#pragma target 5.0
		#pragma multi_compile_instancing

		sampler2D _MainTex;
		float4 _FadeEnd;
		float _FadeRate;
		float _BegDist;

		#include "gpuinstance_includes.cginc"

		struct Input
		{
			float2 uv_MainTex;
			fixed4 color;
			float3 worldPos;
		};

		void setup()
		{
			do_instance_setup();
		}

		void vert(inout appdata_full v, out Input o)
		{
			UNITY_INITIALIZE_OUTPUT(Input, o);
			int id = get_instance_id();
			o.color = get_instance_color(id);
		}

		void surf(Input IN, inout SurfaceOutputStandard o)
		{
			fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * IN.color;
			o.Albedo = c.rgb;
			o.Alpha = c.a;
		}

		void colorOverride(Input IN, SurfaceOutputStandard o, inout fixed4 color)
		{
			float endDistance = distance(IN.worldPos, _WorldSpaceCameraPos);
			endDistance = clamp((endDistance - _BegDist) * _FadeRate, 0, 1);
			color = color * (1 - endDistance) + (IN.color * endDistance) * _FadeEnd;
		}

		ENDCG
		}
			FallBack "Diffuse"
}