HDRenderPipeline: Add script to call keyword update on material

Assets/ScriptableRenderPipeline/HDRenderPipeline/Editor/HDRenderPipelineMenuItems.cs

                 }
             }
         }
+
+        [MenuItem("HDRenderPipeline/Update all materials keywords")]
+        static void UpdateAllMaterialKeywords()
+        {
+            Object[] materials = Resources.FindObjectsOfTypeAll<Material>();
+            foreach (Object obj in materials)
+            {
+                Material mat = obj as Material;
+                if (mat.shader.name == "HDRenderPipeline/LayeredLit" || mat.shader.name == "HDRenderPipeline/LayeredLitTessellation")
+                {
+                    LayeredLitGUI.SetupMaterialKeywords(mat);
+                }
+                else if (mat.shader.name == "HDRenderPipeline/Lit" || mat.shader.name == "HDRenderPipeline/LitTessellation")
+                {
+                    LitGUI.SetupMaterialKeywords(mat);
+                }
+            }
+        }
     }
 }

Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Editor/BaseLitUI.cs

             SetKeyword(material, "_DISTORTION_ON", distortionEnable);
             SetKeyword(material, "_DEPTHOFFSET_ON", depthOffsetEnable);
 
-            material.SetInt("_StencilRef", (int)material.GetFloat(kMaterialID)); // See 'StencilBits'.
+            if (material.HasProperty(kMaterialID))
+                material.SetInt("_StencilRef", (int)material.GetFloat(kMaterialID)); // See 'StencilBits'.
 
             bool enablePerPixelDisplacement = material.GetFloat(kEnablePerPixelDisplacement) > 0.0f;
             SetKeyword(material, "_PER_PIXEL_DISPLACEMENT", enablePerPixelDisplacement);