StackLit: Fix SG surface option property block to only display energy conserving specular color option for the specular input parametrization (similar to case 1257050) (#3060)

Author: slunity

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -39,6 +39,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed issue with shadow mask and area lights.
 - Fixed an issue with the capture callback (now includes post processing results).
 - Fixed decal draw order for ShaderGraph decal materials.
+- Fixed StackLit ShaderGraph surface option property block to only display energy conserving specular color option for the specular parametrization (case 1257050)
 
 ### Changed
 - Removed the material pass probe volumes evaluation mode.

com.unity.render-pipelines.high-definition/Editor/Material/StackLit/ShaderGraph/StackLitSurfaceOptionPropertyBlock.cs

@@ -33,7 +33,10 @@ protected override void CreatePropertyGUI()
             // StackLit specific properties:
 
             AddProperty("Base Color Parametrization", () => stackLitData.baseParametrization, (newValue) => stackLitData.baseParametrization = newValue);
-            AddProperty("Energy Conserving Specular", () => stackLitData.energyConservingSpecular, (newValue) => stackLitData.energyConservingSpecular = newValue, 1);
+            if (stackLitData.baseParametrization == StackLit.BaseParametrization.SpecularColor)
+            {
+                AddProperty("Energy Conserving Specular", () => stackLitData.energyConservingSpecular, (newValue) => stackLitData.energyConservingSpecular = newValue, 1);
+            }
 
             // Material type enables:
             context.AddLabel("Material Core Features", 0);