Added an additional check in the "check scene for ray tracing" (case 1314963). (#3616)

Author: anisunity

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

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Added browsing of the documentation of Compositor Window
 - Added a complete solution for volumetric clouds for HDRP including a cloud map generation tool.
 - Added a Force Forward Emissive option for Lit Material that forces the Emissive contribution to render in a separate forward pass when the Lit Material is in Deferred Lit shader Mode.
+- Added an additional check in the "check scene for ray tracing" (case 1314963).
 
 ### Fixed
 - Fixed an exception when opening the color picker in the material UI (case 1307143).

com.unity.render-pipelines.high-definition/Editor/RenderPipeline/HDRenderPipelineMenuItems.cs

@@ -528,6 +528,8 @@ static void CheckSceneContentForRayTracing(MenuCommand menuCommand)
 
                 bool materialIsOnlyTransparent = true;
                 bool hasTransparentSubMaterial = false;
+                bool singleSided = true;
+                bool hasSingleSided = false;
 
                 for (int meshIdx = 0; meshIdx < numSubMeshes; ++meshIdx)
                 {
@@ -547,6 +549,13 @@ static void CheckSceneContentForRayTracing(MenuCommand menuCommand)
                             // aggregate the transparency info
                             materialIsOnlyTransparent &= materialIsTransparent;
                             hasTransparentSubMaterial |= materialIsTransparent;
+
+                            // Evaluate if it is single sided
+                            bool doubleSided = currentMaterial.doubleSidedGI || currentMaterial.IsKeywordEnabled("_DOUBLESIDED_ON");
+
+                            // Aggregate the double sided information
+                            hasSingleSided |= !doubleSided;
+                            singleSided &= !doubleSided;
                         }
                         else
                         {
@@ -561,6 +570,12 @@ static void CheckSceneContentForRayTracing(MenuCommand menuCommand)
                     Debug.LogWarning("The object " + currentRenderer.name + " has both transparent and opaque sub-meshes. This may cause performance issues");
                     generalErrorFlag = true;
                 }
+
+                if (!singleSided && hasSingleSided)
+                {
+                    Debug.LogWarning("The object " + currentRenderer.name + " has both double sided and single sided sub-meshes. The double sided flag will be ignored.");
+                    generalErrorFlag = true;
+                }
             }
 
             if (!generalErrorFlag)