export texture compatible with CustomTexture (wip)

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Templates/ExportTexture.template

 		Pass 
 		{
 			CGPROGRAM
-			#pragma vertex vert
+			#include "UnityCustomRenderTexture.cginc"
+		 	#pragma vertex CustomRenderTextureVertexShader
-			#include "UnityCG.cginc"
+			#pragma target 4.0
-
-			struct v2f 
-			{
-				float4 pos : SV_POSITION;
-${ShaderInputs}
-			};
-			v2f vert (appdata_full v) 
-			{
-				v2f o = (v2f)0;
-				o.pos = UnityObjectToClipPos(v.vertex);
-${VertexShaderBody}
-				return o;
-			}
-
-			half4 frag (v2f IN) : COLOR
+			float4 frag(v2f_customrendertexture IN) : COLOR
 			{
 ${PixelShaderBody}
 			}

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/SurfaceModel/ExportTextureMasterNode.cs

             var shaderPropertiesVisitor = new PropertyGenerator();
             var shaderPropertyUsagesVisitor = new ShaderGenerator();
             var shaderInputVisitor = new ShaderGenerator();
-            var vertexShaderBlock = new ShaderGenerator();
-            vertexShaderBlock.AddShaderChunk("float3 worldPos = mul(unity_ObjectToWorld, v.vertex).xyz;", true);
-            vertexShaderBlock.AddShaderChunk("float3 viewDir = UnityWorldSpaceViewDir(worldPos);", true);
-            vertexShaderBlock.AddShaderChunk("float4 screenPos = ComputeScreenPos(UnityObjectToClipPos(v.vertex));", true);
-            vertexShaderBlock.AddShaderChunk("float3 worldNormal = UnityObjectToWorldNormal(v.normal);", true);
-
-                shaderInputVisitor.AddShaderChunk("float3 worldPos : TEXCOORD0;", true);
-                vertexShaderBlock.AddShaderChunk("o.worldPos = worldPos;", true);
-                shaderBodyVisitor.AddShaderChunk("float3 " + ShaderGeneratorNames.WorldSpacePosition + " = IN.worldPos;", true);
+                shaderBodyVisitor.AddShaderChunk("float3 " + ShaderGeneratorNames.WorldSpacePosition + " = float3(0.0, 0.0, 0.0);", true);
-                shaderInputVisitor.AddShaderChunk("float3 worldNormal : TEXCOORD1;", true);
-                vertexShaderBlock.AddShaderChunk("o.worldNormal = worldNormal;", true);
-                shaderBodyVisitor.AddShaderChunk("float3 " + ShaderGeneratorNames.WorldSpaceNormal + " = normalize(IN.worldNormal);", true);
+                shaderBodyVisitor.AddShaderChunk("float3 " + ShaderGeneratorNames.WorldSpaceNormal + " = float3(0.0, 0.0, 1.0);", true);
             }
 
             for (int uvIndex = 0; uvIndex < ShaderGeneratorNames.UVCount; ++uvIndex)
                 {
-                    shaderInputVisitor.AddShaderChunk(string.Format("half4 meshUV{0} : TEXCOORD{1};", uvIndex, (uvIndex + 5)), true);
-                    vertexShaderBlock.AddShaderChunk(string.Format("o.meshUV{0} = v.texcoord{1};", uvIndex, uvIndex == 0 ? "" : uvIndex.ToString()), true);
-                    shaderBodyVisitor.AddShaderChunk(string.Format("half4 {0} = IN.meshUV{1};", channel.GetUVName(), uvIndex), true);
+                    shaderBodyVisitor.AddShaderChunk("half4 " + channel.GetUVName() + " = float4(IN.localTexcoord.xyz,1.0);", true);
-                shaderBodyVisitor.AddShaderChunk(
-                    "float3 "
-                    + ShaderGeneratorNames.WorldSpaceViewDirection
-                    + " = normalize(UnityWorldSpaceViewDir("
-                    + ShaderGeneratorNames.WorldSpacePosition
-                    + "));", true);
+                shaderBodyVisitor.AddShaderChunk("float3 " + ShaderGeneratorNames.WorldSpaceViewDirection + " = float3(0.0, 0.0, -1.0);", true);
-                shaderInputVisitor.AddShaderChunk("float4 screenPos : TEXCOORD3;", true);
-                vertexShaderBlock.AddShaderChunk("o.screenPos = screenPos;", true);
-                shaderBodyVisitor.AddShaderChunk("half4 " + ShaderGeneratorNames.ScreenPosition + " = IN.screenPos;", true);
+                shaderBodyVisitor.AddShaderChunk("half4 " + ShaderGeneratorNames.ScreenPosition + " = float4(IN.globalTexcoord.xyz, 1.0);", true);
-
-                shaderInputVisitor.AddShaderChunk("float4 worldTangent : TEXCOORD4;", true);
-                vertexShaderBlock.AddShaderChunk("o.worldTangent = float4(UnityObjectToWorldDir(v.tangent.xyz), v.tangent.w);", true);
-                shaderBodyVisitor.AddShaderChunk("float3 " + ShaderGeneratorNames.WorldSpaceTangent + " = normalize(IN.worldTangent.xyz);", true);
+                shaderBodyVisitor.AddShaderChunk("float3 " + ShaderGeneratorNames.WorldSpaceTangent + " = float3(1.0,0.0,0.0);", true);
-
-                shaderBodyVisitor.AddShaderChunk(string.Format("float3 {0} = cross({1}, {2}) * IN.worldTangent.w;", ShaderGeneratorNames.WorldSpaceBitangent, ShaderGeneratorNames.WorldSpaceNormal, ShaderGeneratorNames.WorldSpaceTangent), true);
+                shaderBodyVisitor.AddShaderChunk("float3 " + ShaderGeneratorNames.WorldSpaceBitangent + " = float3(0.0,1.0,0.0);", true);
-                vertexShaderBlock.AddShaderChunk("o.color = v.color;", true);
-                shaderBodyVisitor.AddShaderChunk("float4 " + ShaderGeneratorNames.VertexColor + " = IN.color;", true);
+                shaderBodyVisitor.AddShaderChunk("float4 " + ShaderGeneratorNames.VertexColor + " = float4(1.0,1.0,1.0,1.0);", true);
             }
 
             var generationMode = GenerationMode.Preview;
             template = template.Replace("${ShaderName}", GetType() + guid.ToString());
             template = template.Replace("${ShaderPropertiesHeader}", shaderPropertiesVisitor.GetShaderString(2));
             template = template.Replace("${ShaderPropertyUsages}", shaderPropertyUsagesVisitor.GetShaderString(3));
-            template = template.Replace("${ShaderInputs}", shaderInputVisitor.GetShaderString(4));
-            template = template.Replace("${VertexShaderBody}", vertexShaderBlock.GetShaderString(4));
-            string vertexShaderBody = vertexShaderBlock.GetShaderString(4);
-            if (vertexShaderBody.Length > 0)
-            {
-                template = template.Replace("${VertexShaderDecl}", "vertex:vert");
-                template = template.Replace("${VertexShaderBody}", vertexShaderBody);
-            }
-            else
-            {
-                template = template.Replace("${VertexShaderDecl}", "");
-                template = template.Replace("${VertexShaderBody}", vertexShaderBody);
-            }
-
+