clean sky setup

ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.cs

 
                 if (m_SkyManager.IsSkyValid())
                 {
-                    m_SkyManager.SetGlobalSkyTexture();
+                    m_SkyManager.SetGlobalSkyTexture(cmd);
                     cmd.SetGlobalInt(HDShaderIDs._EnvLightSkyEnabled, 1);
                 }
                 else

ScriptableRenderPipeline/HDRenderPipeline/Lighting/TilePass/TilePass.cs

 
                             cmd.SetComputeTextureParam(deferredComputeShader, kernel, HDShaderIDs._AmbientOcclusionTexture, HDShaderIDs._AmbientOcclusionTexture);
 
-                            cmd.SetComputeTextureParam(deferredComputeShader, kernel, HDShaderIDs._SkyTexture, skyTexture ? skyTexture : m_DefaultTexture2DArray);
-                            cmd.SetComputeFloatParam(deferredComputeShader, HDShaderIDs._SkyTextureMipCount, skyTextureMipCount);
-
                             cmd.SetComputeTextureParam(deferredComputeShader, kernel, HDShaderIDs.specularLightingUAV, colorBuffers[0]);
                             cmd.SetComputeTextureParam(deferredComputeShader, kernel, HDShaderIDs.diffuseLightingUAV,  colorBuffers[1]);
 

ScriptableRenderPipeline/HDRenderPipeline/Sky/SkyManager.cs

 
         // Sets the global MIP-mapped cubemap '_SkyTexture' in the shader.
         // The texture being set is the sky (environment) map pre-convolved with GGX.
-        public void SetGlobalSkyTexture()
+        public void SetGlobalSkyTexture(CommandBuffer cmd)
-            Shader.SetGlobalTexture(HDShaderIDs._SkyTexture, m_SkyboxGGXCubemapRT);
+            cmd.SetGlobalTexture(HDShaderIDs._SkyTexture, m_SkyboxGGXCubemapRT);
-            Shader.SetGlobalFloat(HDShaderIDs._SkyTextureMipCount, mipCount);
+            cmd.SetGlobalFloat(HDShaderIDs._SkyTextureMipCount, mipCount);
         }
 
         public void Resize(float nearPlane, float farPlane)