Increase max limit in UX of lights (#702)

* Raise the max for lights

* Update CHANGELOG.md

Author: sebastienlagarde

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

@@ -761,6 +761,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Changed default exposure compensation to 0.
 - Refactored shadow caching system.
 - Removed experimental namespace for ray tracing code.
+- Increase limit for max numbers of lights in UX
 
 ## [7.1.1] - 2019-09-05
 

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

@@ -264,12 +264,12 @@ internal struct ProcessedProbeData
     public partial class HDRenderPipeline
     {
         internal const int k_MaxCacheSize = 2000000000; //2 GigaByte
-        internal const int k_MaxDirectionalLightsOnScreen = 16;
-        internal const int k_MaxPunctualLightsOnScreen    = 512;
-        internal const int k_MaxAreaLightsOnScreen        = 128;
-        internal const int k_MaxDecalsOnScreen = 512;
+        internal const int k_MaxDirectionalLightsOnScreen = 512;
+        internal const int k_MaxPunctualLightsOnScreen    = 2048;
+        internal const int k_MaxAreaLightsOnScreen        = 1024;
+        internal const int k_MaxDecalsOnScreen = 2048;
         internal const int k_MaxLightsOnScreen = k_MaxDirectionalLightsOnScreen + k_MaxPunctualLightsOnScreen + k_MaxAreaLightsOnScreen + k_MaxEnvLightsOnScreen;
-        internal const int k_MaxEnvLightsOnScreen = 128;
+        internal const int k_MaxEnvLightsOnScreen = 1024;
         internal static readonly Vector3 k_BoxCullingExtentThreshold = Vector3.one * 0.01f;
 
         #if UNITY_SWITCH