Added information about rt scene validation (#3611)

* Added information about rt scene validation

* Added a new flag

com.unity.render-pipelines.high-definition/Documentation~/Menu-Items.md

@@ -33,11 +33,11 @@ This group of menu items is useful when you upgrade your Unity Project from usin
 
 ### Other items
 
-| **Item**                                     | **Description**                                              |
-| -------------------------------------------- | ------------------------------------------------------------ |
-| **Render Selected HDRP Camera to Log EXR**   | Exports the current [Camera](HDRP-Camera.md)'s view to a log-encoded EXR file. This is useful when [authoring lookup textures](Authoring-LUTs.md). |
-| **Export HDRP Sky to Image**                 | Exports the current sky as a static HDRI.                    |
-| **Check Scene Content for HDRP Ray Tracing** | Checks every GameObject in the current scene and throws warnings if:A Mesh Filter references a null Mesh.A Mesh Renderer references a null Material.A Submesh within a single Renderer reference both a transparent and opaque Material. |
+| **Item**                                                     | **Description**                                              |
+| ------------------------------------------------------------ | ------------------------------------------------------------ |
+| **Render Selected HDRP Camera to Log EXR**                   | Exports the current [Camera](HDRP-Camera.md)'s view to a log-encoded EXR file. This is useful when [authoring lookup textures](Authoring-LUTs.md). |
+| **Export HDRP Sky to Image**                                 | Exports the current sky as a static HDRI.                    |
+| **Check Scene Content for HDRP Ray Tracing**                 | Checks every GameObject in the current scene and throws warnings if:<br/>&#8226; A Mesh Filter references a null Mesh.<br/>&#8226; A Mesh Renderer references a null Material.<br/>&#8226; A sub-mesh within a single Renderer reference both a transparent and opaque Material.<br/>&#8226; A Mesh has more than 32 sub-meshes.<br/>&#8226; A Mesh contains both double-sided and single-sided sub-meshes.|
 | **Enable HDRP Force Forward Emissive on Selected Materials** | Checks every Material in the current selection and Enable the Force Emissive Forward property if it exist. |
-| **Enable HDRP Force Forward Emissive on Scene Materials**      | Checks every Material in the current scene and Enable the Force Emissive Forward property if it exist. |
-| **Disable HDRP Force Forward Emissive on Scene Materials**     | Checks every Material and Material in the current scene and Enable the Force Emissive Forward property if it exist. |
+| **Enable HDRP Force Forward Emissive on Scene Materials**    | Checks every Material in the current scene and Enable the Force Emissive Forward property if it exist. |
+| **Disable HDRP Force Forward Emissive on Scene Materials**   | Checks every Material and Material in the current scene and Enable the Force Emissive Forward property if it exist. |

com.unity.render-pipelines.high-definition/Documentation~/Ray-Tracing-Getting-Started.md

@@ -61,7 +61,7 @@ There are two ways to do this:
 
 * [Manual setup](#ManualSetup)
 
-Once you have completed one of these, move onto [Final setup](#FinalSetup).
+Once you have completed one of these, move onto [Final setup](#final-setup).
 
 <a name="WizardSetup"></a>
 
@@ -74,7 +74,7 @@ You can use the [Render Pipeline Wizard](Render-Pipeline-Wizard.md) to set up ra
 3. Click the Fix All button.
 4. (Optional) Enable the HDRP asset features that are required for the ray tracing effects.
 
-Your HDRP Project now supports ray tracing. For information on how to set up ray tracing for your Scene, see [final setup](#FinalSetup).
+Your HDRP Project now supports ray tracing. For information on how to set up ray tracing for your Scene, see [final setup](#final-setup).
 
 <a name="ManualSetup"></a>
 
@@ -148,17 +148,16 @@ To enable the above effects in your HDRP Unity Project:
 4. Go to **Lighting > Shadows** and enable **Screen Space Shadows**.
 5. Go to **Lighting > Lighting** and enable **Screen Space Global Illumination**.
 
-Your HDRP Project now fully supports ray tracing. For information on how to set up ray tracing for your Scene, see [final setup](#FinalSetup).
-
-<a name="FinalSetup"></a>
+Your HDRP Project now fully supports ray tracing. For information on how to set up ray tracing for your Scene, see [final setup](#final-setup).
 
 ### Final setup
 
 Now that your HDRP Project supports ray tracing, there are a few steps you must complete in order to actually use it in your Scene.
 
-1. [Frame Settings validation](#FinalSetup-FrameSettings)
+1. [Frame Settings validation](#frame-settings)
+2. [Build settings validation](#build-settings)
+3. [Scene validation](#scene-validation)
 
-<a name="FinalSetup-FrameSettings"></a>
 
 #### Frame Settings
 
@@ -176,15 +175,19 @@ To enable ray tracing for a specific Camera:
 2. In the **General** section, enable **Custom Frame Settings**. This exposes Frame Settings just for this Camera.
 3. in the **Rendering** section, enable **Ray Tracing**.
 
-<a name="FinalSetup-BuildSettings"></a>
-
 #### Build settings
 
 To build your Project to a Unity Player, ray tracing requires that the build uses 64 bits architecture. To set your build to use 64 bits architecture:
 
 1. Open the Build Settings window (menu: **File > Build Settings**).
 2. From the **Architecture** drop-down, select **x86_64**.
 
+#### Scene validation
+
+To check whether it is possible to use ray tracing in a Scene, HDRP includes a menu option that validates each GameObject in the Scene. If you do not setup GameObjects correctly, this process throws warnings in the Console window. To use it:
+1. Click **Edit > Rendering > Check Scene Content for HDRP Ray Tracing**.
+2. In the Console window (menu: **Window > General > Console**), check if there are any warnings.
+
 <a name="RayTracingEffectsOverview"></a>
 
 ## Ray tracing effects overview