Fix the direction of the sun

Assets/ScriptableRenderLoop/HDRenderLoop/Sky/AtmosphericParameters.cs

     public float              occlusionBiasSkyRayleigh  = 0.2f;
     public float              occlusionBiasSkyMie       = 0.4f;
     */
-    
+
-    // public bool            forcePerPixel             = true; 
+    // public bool            forcePerPixel             = true;
-    
+
     // [HideInInspector] public Shader occlusionShaderOverride;
 
     // Camera   m_currentCamera;
     Material m_atmosphericMaterial = null;
     // Material m_occlusionMaterial   = null;
     bool     m_isAwake             = false;
-    
+
     public static AtmosphericParameters instance { get; private set; }
 
     void Awake()
         occlusionBiasSkyRayleigh = Mathf.Clamp01(occlusionBiasSkyRayleigh);
         occlusionBiasSkyMie      = Mathf.Clamp01(occlusionBiasSkyMie);
         */
-        
+
         skyDomeExposure = Mathf.Clamp(skyDomeExposure, 0f, 8f);
 
         if (instance == this)
         {
             Debug.LogErrorFormat("Unexpected: AtmosphericParameters.instance already set (to: {0}). Still overriding with: {1}.", instance.name, name);
         }
-        
+
         instance = this;
     }
 
         */
 
         Shader.SetGlobalFloat("_WorldScaleExponent", worldScaleExponent);
-        
+
-        
+
-        
+
-        
+
         Shader.SetGlobalFloat("_HeightSeaLevel", heightSeaLevel);
         Shader.SetGlobalFloat("_HeightDistanceRcp", 1f/heightDistance);
         Shader.SetGlobalVector("_HeightPlaneShift", heightPlaneShift);
         Shader.SetGlobalFloat("_MieExtinctionFactor", worldMieExtinctionFactor);
-        
+
-        
+
-        
+
-        
+
         Shader.SetGlobalVector("_MieColorM20", (Vector4)mieColorM20 * worldMieColorIntensity);
         Shader.SetGlobalVector("_MieColorO00", (Vector4)mieColorO00 * worldMieColorIntensity);
         Shader.SetGlobalVector("_MieColorP20", (Vector4)mieColorP20 * worldMieColorIntensity);
             var camRgt = m_currentCamera.transform.right;
             var camUp = m_currentCamera.transform.up;
             var camFwd = m_currentCamera.transform.forward;
-                
+
-                
+
             var vpCenter = camFwd * m_currentCamera.farClipPlane;
             var vpRight = camRgt * dx * m_currentCamera.farClipPlane;
             var vpUp = camUp * dy * m_currentCamera.farClipPlane;
             var downscale = 1f / (float)(int)occlusionDownscale;
             var occWidth = Mathf.RoundToInt(srcRect.width * downscale);
             var occHeight = Mathf.RoundToInt(srcRect.height * downscale);
-            var occlusionId = Shader.PropertyToID("_OcclusionTexture");    
+            var occlusionId = Shader.PropertyToID("_OcclusionTexture");
-                null, 
+                null,
                 occlusionId,
                 m_occlusionMaterial,
                 (int)occlusionSamples
         Shader.SetGlobalMatrix("_SkyDomeRotation",
              Matrix4x4.TRS(Vector3.zero, Quaternion.Euler(skyDomeRotation.x, 0f, 0f), Vector3.one)
            * Matrix4x4.TRS(Vector3.zero, Quaternion.Euler(0f, skyDomeRotation.y - trackedYaw, 0f), Vector3.one)
-           * Matrix4x4.TRS(Vector3.zero, Quaternion.identity, new Vector3(1f, skyDomeVerticalFlip ? -1f : 1f, 1f))                   
+           * Matrix4x4.TRS(Vector3.zero, Quaternion.identity, new Vector3(1f, skyDomeVerticalFlip ? -1f : 1f, 1f))
-        Shader.SetGlobalVector("_SunDirection",    transform.forward); 
+        Shader.SetGlobalVector("_SunDirection",    -transform.forward);
         Shader.SetGlobalFloat("_WorldMieDensity",  -worldMieDensity / 100000f);
         Shader.SetGlobalFloat("_HeightMieDensity", -heightMieDensity / 100000f);