Updated reflection system settings

ScriptableRenderPipeline/HDRenderPipeline/HDRP/HDRenderPipelineAsset.cs

             {
                 return new ReflectionSystemParameters
                 {
-                    maxPlanarReflectionProbePerRender = renderPipelineSettings.lightLoopSettings.planarReflectionProbeCacheSize,
+                    maxPlanarReflectionProbePerCamera = renderPipelineSettings.lightLoopSettings.planarReflectionProbeCacheSize,
                     maxActivePlanarReflectionProbe = 512,
                     planarReflectionProbeSize = renderPipelineSettings.lightLoopSettings.planarReflectionTextureSize
                 };

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/Reflection/ReflectionProbeCullResults.cs

 
         internal ReflectionProbeCullResults(ReflectionSystemParameters parameters)
         {
-            Assert.IsTrue(parameters.maxPlanarReflectionProbePerRender >= 0, "Maximum number of planar reflection probe must be positive");
+            Assert.IsTrue(parameters.maxPlanarReflectionProbePerCamera >= 0, "Maximum number of planar reflection probe must be positive");
-            m_PlanarReflectionProbeIndices = new int[parameters.maxPlanarReflectionProbePerRender];
-            m_VisiblePlanarReflectionProbes = new PlanarReflectionProbe[parameters.maxPlanarReflectionProbePerRender];
+            m_PlanarReflectionProbeIndices = new int[parameters.maxPlanarReflectionProbePerCamera];
+            m_VisiblePlanarReflectionProbes = new PlanarReflectionProbe[parameters.maxPlanarReflectionProbePerCamera];
         }
 
         public void CullPlanarReflectionProbes(CullingGroup cullingGroup, PlanarReflectionProbe[] planarReflectionProbes)

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/Reflection/ReflectionSystemInternal.cs

             m_PlanarReflectionProbeBounds = new Dictionary<PlanarReflectionProbe, BoundingSphere>(parameters.maxActivePlanarReflectionProbe);
             m_PlanarReflectionProbesArray = new PlanarReflectionProbe[parameters.maxActivePlanarReflectionProbe];
             m_PlanarReflectionProbeBoundsArray = new BoundingSphere[parameters.maxActivePlanarReflectionProbe];
-            m_PlanarReflectionProbe_RealtimeUpdate_WorkArray = new PlanarReflectionProbe[parameters.maxPlanarReflectionProbePerRender];
+            m_PlanarReflectionProbe_RealtimeUpdate_WorkArray = new PlanarReflectionProbe[parameters.maxPlanarReflectionProbePerCamera];
 
             // Persistent collections
             m_PlanarReflectionProbes = new HashSet<PlanarReflectionProbe>();

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/Reflection/ReflectionSystemParameters.cs

 namespace UnityEngine.Experimental.Rendering.HDPipeline
 {
+    /// <summary>
+    /// Holds settings for the reflection system.
+    /// </summary>
-            maxPlanarReflectionProbePerRender = 512,
+            maxPlanarReflectionProbePerCamera = 128,
-        public int maxPlanarReflectionProbePerRender;
+        /// <summary>
+        /// Maximum number of planar reflection that can be found in a cull result.
+        /// </summary>
+        public int maxPlanarReflectionProbePerCamera;
+
+        /// <summary>
+        /// Maximum number of active planar reflection in the world.
+        /// </summary>
+
+        /// <summary>
+        /// Size of the planar probe textures.
+        /// </summary>
         public int planarReflectionProbeSize;
     }
 }