Merge pull request #1798 from Unity-Technologies/HDRP/apply-dimmer-to-transmission

Hdrp/apply shadow dimmer of punctual light to transmission

com.unity.render-pipelines.high-definition/HDRP/Lighting/LightEvaluation.hlsl

             // Note: we do not modify the distance to the light, or the light angle for the back face.
             // This is a performance-saving optimization which makes sense as long as the thickness is small.
         }
+        
+        transmittance = lerp( bsdfData.transmittance, transmittance, lightData.shadowDimmer);
     }
 
     return transmittance;