Fixed light layers not correctly disabled when the lightlayers is set to Nothing and Lightlayers isn't enabled in HDRP Asset (#584)

Author: sebastienlagarde

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

@@ -621,6 +621,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Cloned volume profile from read only assets are created in the root of the project. (case 1154961)
 - Fixed Wizard check on default volume profile to also check it is not the default one in package.
 - Fix erroneous central depth sampling in TAA.
+- Fixed light layers not correctly disabled when the lightlayers is set to Nothing and Lightlayers isn't enabled in HDRP Asset
 
 ### Changed
 - Improve MIP selection for decals on Transparents

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

@@ -1191,7 +1191,7 @@ internal void GetDirectionalLightData(CommandBuffer cmd, HDCamera hdCamera, Visi
 
             var lightData = new DirectionalLightData();
 
-            lightData.lightLayers = additionalLightData.GetLightLayers();
+            lightData.lightLayers = hdCamera.frameSettings.IsEnabled(FrameSettingsField.LightLayers) ? additionalLightData.GetLightLayers() : uint.MaxValue;
 
             // Light direction for directional is opposite to the forward direction
             lightData.forward = light.GetForward();
@@ -1343,7 +1343,7 @@ internal void GetLightData(CommandBuffer cmd, HDCamera hdCamera, HDShadowSetting
             var lightType = processedData.lightType;
 
             var visibleLightAxisAndPosition = light.GetAxisAndPosition();
-            lightData.lightLayers = additionalLightData.GetLightLayers();
+            lightData.lightLayers = hdCamera.frameSettings.IsEnabled(FrameSettingsField.LightLayers) ? additionalLightData.GetLightLayers() : uint.MaxValue;
 
             lightData.lightType = gpuLightType;
 
@@ -1840,7 +1840,7 @@ internal bool GetEnvLightData(CommandBuffer cmd, HDCamera hdCamera, in Processed
                 return false;
 
             InfluenceVolume influence = probe.influenceVolume;
-            envLightData.lightLayers = probe.lightLayersAsUInt;
+            envLightData.lightLayers = hdCamera.frameSettings.IsEnabled(FrameSettingsField.LightLayers) ? probe.lightLayersAsUInt : uint.MaxValue;
             envLightData.influenceShapeType = influence.envShape;
             envLightData.weight = processedProbe.weight;
             envLightData.multiplier = probe.multiplier * m_indirectLightingController.indirectSpecularIntensity.value;