Update SkyManager.cs

ScriptableRenderPipeline/HDRenderPipeline/Sky/SkyManager.cs

                 using (new ProfilingSample(cmd, "DynamicGI.UpdateEnvironment"))
                 {
                     // TODO: Properly send the cubemap to Enlighten. Currently workaround is to set the cubemap in a Skybox/cubemap material
-                    float intensity = IsSkyValid() ? 1.0f : 0.0f;
+                    float intensity = IsSkyValid() ? 1.0f : 0.0f; // Eliminate all diffuse if we don't have a skybox (meaning for now the background is black in HDRP)
-                    RenderSettings.ambientIntensity = intensity; // fix this to 1, this parameter should not exist!
+                    RenderSettings.ambientIntensity = intensity;
                     RenderSettings.ambientMode = AmbientMode.Skybox; // Force skybox for our HDRI
                     RenderSettings.reflectionIntensity = intensity;
                     RenderSettings.customReflection = null;