added mask test object

TestProjects/PerceptionURP/Assets/Lit.mat

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TestProjects/PerceptionURP/Assets/Scenes/ShaderTests.unity

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TestProjects/PerceptionURP/Assets/testext.png.meta

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     filterMode: -1
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+    aniso: 0
     mipBias: -100
     wrapU: -1
     wrapV: -1
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     buildTarget: DefaultTexturePlatform
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TestProjects/PerceptionURP/Packages/manifest.json

     "com.unity.package-validation-suite": "0.9.1-preview",
     "com.unity.perception": "file:../../../com.unity.perception",
     "com.unity.render-pipelines.universal": "7.3.1",
+    "com.unity.scripting.python": "4.0.0-exp.5",
     "com.unity.simulation.capture": "0.0.10-preview.16",
     "com.unity.simulation.core": "0.0.10-preview.21",
     "com.unity.test-framework": "1.1.19",

TestProjects/PerceptionURP/Packages/packages-lock.json

       "dependencies": {},
       "url": "https://packages.unity.com"
     },
+    "com.unity.scripting.python": {
+      "version": "4.0.0-exp.5",
+      "depth": 0,
+      "source": "registry",
+      "dependencies": {},
+      "url": "https://packages.unity.com"
+    },
     "com.unity.shadergraph": {
       "version": "7.3.1",
       "depth": 1,

com.unity.perception/Runtime/GroundTruth/Labelers/Visualization/Materials/SegmentationMaterial.mat

         m_Offset: {x: 0, y: 0}
     m_Floats:
     - _AlphaClip: 1
-    - _BackTransparency: 0
+    - _BackTransparency: 0.08
     - _Blend: 2
     - _BlendOp: 0
     - _BumpScale: 1
     - _QueueOffset: 0
     - _ReceiveShadows: 1
     - _SampleGI: 0
-    - _SegmentTransparency: 0.8
+    - _SegmentTransparency: 1
     - _Shininess: 0
     - _Smoothness: 0.5
     - _SmoothnessSource: 0

com.unity.perception/Runtime/GroundTruth/Labeling/SemanticSegmentationBehaviour.cs

 
 public class SemanticSegmentationBehaviour : MonoBehaviour
 {
-    public bool enableTransparency = false;
-    public float opacityThreshold = 1;
+    //public bool enableTransparency = false;
+    //public float opacityThreshold = 1;
+    public bool useMainTextureAsSegmask = false;
 }

com.unity.perception/Runtime/GroundTruth/RenderPasses/CrossPipelinePasses/InstanceSegmentationCrossPipelinePass.cs

 
             mpb.SetVector(k_SegmentationIdProperty, (Color)color);
 
+            Texture mainTex = null;
+
-                    var maintex = renderer.material.GetTexture("_MainTex");
-                    if (maintex)
-                        mpb.SetTexture("_MainTex", renderer.material.GetTexture("_MainTex"));
+                    mainTex = renderer.material.GetTexture("_MainTex");
+                    // if (maintex)
+                    //     mpb.SetTexture("_MainTex", renderer.material.GetTexture("_MainTex"));
-
-
             }
 
             var segBeh = renderer? renderer.gameObject.GetComponent<SemanticSegmentationBehaviour>() : null;
                 {
                     mpb.SetFloat("_TextureIsSegmentationMask", 1);
-                    if (segBeh.useSegmentationMask)
+                    if (segBeh.useMainTextureAsSegmask)
+                        if (mainTex == null)
+                            Debug.LogError("No texture found on object");
+                        else
+                            mpb.SetTexture("_MainTex", mainTex);
+                    }
+                    else
-                    }
-
-                mpb.SetFloat("_TransparencyThreshold", segBeh.opacityThreshold);
+                //mpb.SetFloat("_TransparencyThreshold", segBeh.opacityThreshold);
             }
 
 #if PERCEPTION_DEBUG

com.unity.perception/Runtime/GroundTruth/RenderPasses/CrossPipelinePasses/SemanticSegmentationCrossPipelinePass.cs

             // Set the labeling ID so that it can be accessed in ClassSemanticSegmentationPass.shader
             mpb.SetVector(k_LabelingId, found ? entry.color : Color.black);
 
+            Texture mainTex = null;
+
-                    var maintex = renderer.material.GetTexture("_MainTex");
-                    if (maintex)
-                        mpb.SetTexture("_MainTex", renderer.material.GetTexture("_MainTex"));
+                    mainTex = renderer.material.GetTexture("_MainTex");
+                    // if (maintex)
+                    //     mpb.SetTexture("_MainTex", renderer.material.GetTexture("_MainTex"));
                 }
                 mpb.SetColor("_BaseColor", renderer.material.color);
             }
                 if (segBeh.useSegmentationMask)
                 {
                     mpb.SetFloat("_TextureIsSegmentationMask", 1);
-                    if (segBeh.useSegmentationMask)
+                    if (segBeh.useMainTextureAsSegmask)
-                        mpb.SetTexture("_MainTex", segBeh.segmentationMask);
+                        if (mainTex == null)
+                            Debug.LogError("No texture found on object");
+                        else
+                            mpb.SetTexture("_MainTex", mainTex);
+                    else
+                        mpb.SetTexture("_MainTex", segBeh.segmentationMask);
-
-                mpb.SetFloat("_TransparencyThreshold", segBeh.opacityThreshold);
+                //mpb.SetFloat("_TransparencyThreshold", segBeh.opacityThreshold);
             }
 
         }

com.unity.perception/Runtime/GroundTruth/Resources/InstanceSegmentation.shader

     {
         _MainTex ("Texture", 2D) = "white" {}
         _BaseColor("Color", Color) = (1,1,1,1)
-        _EnableTransparency ("Enable Transparency", Range(0,1)) = 1
-        _TransparencyThreshold ("Transparency Threshold", Range(0,1)) = 1
+        //_EnableTransparency ("Enable Transparency", Range(0,1)) = 1
+        //_TransparencyThreshold ("Transparency Threshold", Range(0,1)) = 1
         _TextureIsSegmentationMask ("Use Texture as Segmentation Mask", Range(0,1)) = 0
         [PerObjectData] _SegmentationId("Segmentation ID", vector) = (0,0,0,1)
     }
             sampler2D _MainTex;
             fixed4 _BaseColor;
             float4 _MainTex_ST;
-            float _TransparencyThreshold;
+            //float _TransparencyThreshold;
-            float _EnableTransparency;
+            //float _EnableTransparency;
 
             struct appdata
             {
                     return outColor;
                 }
 
-                float opacity = 1 * _BaseColor.a;
-                if (opacity < _TransparencyThreshold)
-                    outColor.a = 0;
-                else
-                    outColor.a = 1;
+                // float opacity = 1 * _BaseColor.a;
+                // if (opacity < _TransparencyThreshold)
+                //     outColor.a = 0;
+                // else
+                //     outColor.a = 1;
+
                 return outColor;
             }
             ENDCG

com.unity.perception/Runtime/GroundTruth/Resources/SemanticSegmentation.shader

     {
         _MainTex ("Texture", 2D) = "white" {}
         _BaseColor("Color", Color) = (1,1,1,1)
-        _EnableTransparency ("Enable Transparency", Range(0,1)) = 1
-        _TransparencyThreshold ("Transparency Threshold", Range(0,1)) = 1
+       // _EnableTransparency ("Enable Transparency", Range(0,1)) = 1
+       // _TransparencyThreshold ("Transparency Threshold", Range(0,1)) = 1
         _TextureIsSegmentationMask ("Use Texture as Segmentation Mask", Range(0,1)) = 0
         [PerObjectData] LabelingId("Labeling Id", Vector) = (0,0,0,1)
     }
 
     SubShader
     {
-        Tags { "Queue"="Transparent" "RenderType"="Transparent" }
+        Tags { "RenderType"="Opaque" }
         Blend SrcAlpha OneMinusSrcAlpha
         ZWrite Off
         LOD 100
             sampler2D _MainTex;
             float4 _MainTex_ST;
             fixed4 _BaseColor;
-            float _TransparencyThreshold;
+            //float _TransparencyThreshold;
+            //float _EnableTransparency;
 
             struct in_vert
             {
             fixed4 semanticSegmentationFragmentStage (vertexToFragment vertScreenSpace) : SV_Target
             {
                 fixed4 col = tex2D(_MainTex, vertScreenSpace.uv);
-                //LabelingId = _BaseColor;
+
-                // if (_TextureIsSegmentationMask == 1)
-                // {
-                //     if (col.r == 0 && col.g == 0 && col.b == 0)
-                //         outColor = fixed4(0,0,0,1);
-                //
-                //     return outColor;
-                // }
+                if (_TextureIsSegmentationMask == 1)
+                {
+                    if (col.r == 0 && col.g == 0 && col.b == 0)
+                        outColor = fixed4(0,0,0,1);
+
+                    return outColor;
+                }
-                //float opacity = col.a * _BaseColor.a;
-                float opacity = 2;
-                if (opacity < _TransparencyThreshold)
-                    outColor.a = 0;
-                else
-                    outColor.a = 1;
+                // //float opacity = col.a * _BaseColor.a;
+                // float opacity = 2;
+                // if (opacity < _TransparencyThreshold)
+                //     outColor.a = 0;
+                // else
+                //     outColor.a = 1;
 
                 return outColor;
             }

TestProjects/PerceptionURP/Assets/treemask.png.meta

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+  spriteBorder: {x: 0, y: 0, z: 0, w: 0}
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+  spriteTessellationDetail: -1
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