Bumped Atlas

// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'

Shader "Custom/BumpedLambert" {
	Properties{
		_Color("Color", Color) = (1,1,1,1)
		_MainTex("Albedo (RGB)", 2D) = "white" {}
		_BumpMap("Bumpmap", 2D) = "bump" {}

		_CellSize("Сell Size (See Same On VoxelSettings)", Float) = 0.03125
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
		LOD 200

		CGPROGRAM

		#pragma surface surf Lambert vertex:vert

		// Use shader model 3.0 target, to get nicer looking lighting
		#pragma target 3.0

		sampler2D _MainTex;
		sampler2D _BumpMap;

		struct Input {
			float2 uv_MainTex;
			float2 uv_BumpMap;
			float3 wNormal;
			float3 wPos;
		};

		fixed4 _Color;
		fixed4 _ColorOffset;
		float _CellSize;

		void vert(inout appdata_full v, out Input data)
		{
			UNITY_INITIALIZE_OUTPUT(Input, data);
			//data.uv_MainTex = TRANSFORM_TEX(v.texcoord1, _MainTex);
			//data.uv_BumpMap = TRANSFORM_TEX(v.texcoord2, _BumpMap);
			data.wPos = mul(unity_ObjectToWorld, v.vertex).xyz;
			data.wNormal = mul((float3x3)unity_ObjectToWorld, v.normal);
		}

		void surf (Input i, inout SurfaceOutput o) {

			float2 pos = frac(float2(
				i.wPos.x * (1.0 - i.wNormal.x) + i.wPos.z * i.wNormal.x, //Figure out texel location inside a cell.
				i.wPos.y * (1.0 - i.wNormal.y) + i.wPos.z * i.wNormal.y)) * _CellSize  //Take in account face normal
																									   //+ float2(blockId + margin, floor(blockId) / gridSize + margin)); //Choose the actual tile
				+ float2(floor(i.uv_MainTex.x / _CellSize)*_CellSize,
					floor(i.uv_MainTex.y / _CellSize)*_CellSize);

			fixed4 c = tex2D (_MainTex, pos) * _Color;

			o.Albedo = c.rgb;

			o.Normal = UnpackNormal(tex2D(_BumpMap, pos));

			o.Alpha = c.a;
		}
		ENDCG
	}
	FallBack "Diffuse"
}