Fix for unlit screen position, and tangent world space

com.unity.render-pipelines.high-definition/HDRP/Editor/ShaderGraph/HDPBRPass.template

             $SurfaceDescriptionInputs.ViewSpaceNormal:           output.ViewSpaceNormal =             mul(output.WorldSpaceNormal, (float3x3) UNITY_MATRIX_I_V);         // transposed multiplication by inverse matrix to handle normal scale
             $SurfaceDescriptionInputs.TangentSpaceNormal:        output.TangentSpaceNormal =          float3(0.0f, 0.0f, 1.0f);
 
-            $SurfaceDescriptionInputs.WorldSpaceTangent          output.WorldSpaceTangent =           input.worldToTangent[0].xyz;
+            $SurfaceDescriptionInputs.WorldSpaceTangent:         output.WorldSpaceTangent =           input.worldToTangent[0].xyz;
             $SurfaceDescriptionInputs.ObjectSpaceTangent:        output.ObjectSpaceTangent =          mul((float3x3) unity_WorldToObject, output.WorldSpaceTangent);
             $SurfaceDescriptionInputs.ViewSpaceTangent:          output.ViewSpaceTangent =            mul((float3x3) UNITY_MATRIX_V, output.WorldSpaceTangent);
             $SurfaceDescriptionInputs.TangentSpaceTangent:       output.TangentSpaceTangent =         float3(1.0f, 0.0f, 0.0f);
             $SurfaceDescriptionInputs.TangentSpacePosition:      output.TangentSpacePosition =        float3(0.0f, 0.0f, 0.0f);
 
             // TODO: positionSS is SV_Position, graph input expects screenPosition to be 0..1 across the active viewport (?)
-            $SurfaceDescriptionInputs.ScreenPosition:            float4 clipPos =                    ComputeScreenPos(TransformWorldToHClip(input.positionWS), _ProjectionParams.x);
-            $SurfaceDescriptionInputs.ScreenPosition:            output.ScreenPosition =             clipPos; // float4(clipPos.x * _ScreenSize.x, clipPos.y * _ScreenSize.y, clipPos.zw);          // wtf?
+            $SurfaceDescriptionInputs.ScreenPosition:            output.ScreenPosition =             ComputeScreenPos(TransformWorldToHClip(input.positionWS), _ProjectionParams.x);
             
             $SurfaceDescriptionInputs.uv0:                       output.uv0 =    float4(input.texCoord0, 0.0f, 0.0f);
             $SurfaceDescriptionInputs.uv1:                       output.uv1 =    float4(input.texCoord1, 0.0f, 0.0f);

com.unity.render-pipelines.high-definition/HDRP/Editor/ShaderGraph/HDUnlitPassForward.template

     //-------------------------------------------------------------------------------------
     // End Defines
     //-------------------------------------------------------------------------------------
-    
+
+    #include "ShaderGraphLibrary/Functions.hlsl"
     #include "HDRP/ShaderVariables.hlsl"
     #ifdef DEBUG_DISPLAY
         #include "HDRP/Debug/DebugDisplay.hlsl"
             $VertexDescriptionInputs.TangentSpaceViewDirection: float3x3 tangentSpaceTransform =     float3x3(output.WorldSpaceTangent,output.WorldSpaceBiTangent,output.WorldSpaceNormal);
             $VertexDescriptionInputs.TangentSpaceViewDirection: output.TangentSpaceViewDirection =   mul(tangentSpaceTransform, output.WorldSpaceViewDirection);
 
-            $VertexDescriptionInputs.ScreenPosition:            output.ScreenPosition =              TransformWorldToHClip(output.WorldSpacePosition) * 0.5 + 0.5;
+            $VertexDescriptionInputs.ScreenPosition:            output.ScreenPosition =              ComputeScreenPos(TransformWorldToHClip(output.WorldSpacePosition), _ProjectionParams.x);
             $VertexDescriptionInputs.uv0:                       output.uv0 =                         float4(input.uv0, 0.0f, 0.0f);
             $VertexDescriptionInputs.uv1:                       output.uv1 =                         float4(input.uv1, 0.0f, 0.0f);
             $VertexDescriptionInputs.uv2:                       output.uv2 =                         float4(input.uv2, 0.0f, 0.0f);
             $SurfaceDescriptionInputs.ViewSpaceNormal:           output.ViewSpaceNormal =             mul(output.WorldSpaceNormal, (float3x3) UNITY_MATRIX_I_V);         // transposed multiplication by inverse matrix to handle normal scale
             $SurfaceDescriptionInputs.TangentSpaceNormal:        output.TangentSpaceNormal =          float3(0.0f, 0.0f, 1.0f);
 
-            $SurfaceDescriptionInputs.WorldSpaceTangent          output.WorldSpaceTangent =           input.worldToTangent[0].xyz;
+            $SurfaceDescriptionInputs.WorldSpaceTangent:         output.WorldSpaceTangent =           input.worldToTangent[0].xyz;
             $SurfaceDescriptionInputs.ObjectSpaceTangent:        output.ObjectSpaceTangent =          mul((float3x3) unity_WorldToObject, output.WorldSpaceTangent);
             $SurfaceDescriptionInputs.ViewSpaceTangent:          output.ViewSpaceTangent =            mul((float3x3) UNITY_MATRIX_V, output.WorldSpaceTangent);
             $SurfaceDescriptionInputs.TangentSpaceTangent:       output.TangentSpaceTangent =         float3(1.0f, 0.0f, 0.0f);
             $SurfaceDescriptionInputs.TangentSpacePosition:      output.TangentSpacePosition =        float3(0.0f, 0.0f, 0.0f);
 
             // TODO: positionSS is SV_Position, graph input expects screenPosition to be 0..1 across the active viewport (?)
-            $SurfaceDescriptionInputs.ScreenPosition:            output.ScreenPosition = input.positionSS;
+            $SurfaceDescriptionInputs.ScreenPosition:            output.ScreenPosition =             ComputeScreenPos(TransformWorldToHClip(input.positionWS), _ProjectionParams.x);
             
             $SurfaceDescriptionInputs.uv0:                       output.uv0 =    float4(input.texCoord0, 0.0f, 0.0f);
             $SurfaceDescriptionInputs.uv1:                       output.uv1 =    float4(input.texCoord1, 0.0f, 0.0f);
 
         // Perform alpha test very early to save performance (a killed pixel will not sample textures)
         // TODO: split graph evaluation to grab just alpha dependencies first? tricky..
-#ifdef _ALPHATEST_ON
-        DoAlphaTest(surfaceDescription.Alpha, surfaceDescription.AlphaClipThreshold);
-#endif
+        $AlphaTest:     DoAlphaTest(surfaceDescription.Alpha, surfaceDescription.AlphaClipThreshold);
 
         BuildSurfaceData(fragInputs, surfaceDescription, V, surfaceData);