[Backport 2023.1][Jira # UUM-41081] Adding support to read light inte…

…nsity multiplier during bakes

Mixed runtime lights were not considering the intensity multiplier during bakes. These changes fix this behaviour and make bakes more intuitive.

Packages/com.unity.render-pipelines.high-definition/Documentation~/TableOfContents.md

@@ -21,6 +21,7 @@
   * [High Definition Render Pipeline Wizard](Render-Pipeline-Wizard.md)
   * [Upgrading to HDRP from the built-in render pipeline](Upgrading-To-HDRP.md)
   * [Material Upgrade](Material-Upgrade.md)
+  * [Upgrading from HDRP 14.x(2022.2) to 14.x(2022.3)](Upgrading-from-2022.2-to-2022.3.md)
   * [Upgrading from HDRP 13.x to 14.x](Upgrading-from-2022.1-to-2022.2.md)
   * [Upgrading from HDRP 12.x to 13.x](Upgrading-from-2021.2-to-2022.1.md)
   * [Upgrading from HDRP 11.x to 12.x](Upgrading-from-2021.1-to-2021.2.md)

Packages/com.unity.render-pipelines.high-definition/Documentation~/Upgrading-from-2022.2-to-2022.3.md

@@ -0,0 +1,7 @@
+# Upgrading HDRP from 2022.2 to 2022.3
+
+In the High Definition Render Pipeline (HDRP), some features work differently between major versions. This document helps you upgrade HDRP from 2022.2 to 2022.3
+
+## Light Baking
+
+Starting from 2022.3, APV and lightmap bakes containing lights that are of type "Mixed" will now consider the "intensity multiplier" property, which was not taken into account previously.

Packages/com.unity.render-pipelines.high-definition/Documentation~/Upgrading-from-2022.2-to-2023.1.md

@@ -2,6 +2,10 @@
 
 In the High Definition Render Pipeline (HDRP), some features work differently between major versions. This document helps you upgrade HDRP from 14.x to 15.x.
 
+## Light Baking
+
+Starting from 2022.3, APV and lightmap bakes containing lights that are of type "Mixed" will now consider the "intensity multiplier" property, which was not taken into account previously.
+
 ## Rendering Layers
 
 The Receive Decals property of Materials in HDRP does not affect emissive decals anymore when Decal Layers are enabled. To disable emissive decals on specific meshes, you will have to use a Decal Layer instead of relying on the Receive Decals property.

Packages/com.unity.render-pipelines.high-definition/Runtime/Lighting/GlobalIlluminationUtils.cs

@@ -3,7 +3,7 @@
 
 namespace UnityEngine.Rendering.HighDefinition
 {
-    class GlobalIlluminationUtils
+    internal static class GlobalIlluminationUtils
     {
         // Return true if the light must be added to the baking
         public static bool LightDataGIExtract(Light light, ref LightDataGI lightDataGI)
@@ -32,7 +32,7 @@ public static bool LightDataGIExtract(Light light, ref LightDataGI lightDataGI)
 
             float lightDimmer = 1;
 
-            if (lightMode == LightMode.Realtime && add.affectDiffuse)
+            if (lightMode == LightMode.Realtime || lightMode == LightMode.Mixed)
                 lightDimmer = add.lightDimmer;
 
             lightDataGI.instanceID = light.GetInstanceID();