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ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/Volumetrics/Resources/VolumetricLighting.compute

         float transmittance = Transmittance(opticalDepth);
 
     #if SUPPORT_ASYMMETRY
+        // TODO: precompute and load it from the constant buffer to not waste a VGPR.
         float phase = CornetteShanksPhasePartConstant(asymmetry);
     #else
         float phase = IsotropicPhaseFunction();