Add lerp to take in account the shadow dimmer value of punctual lights after calculating the transmittance.

com.unity.render-pipelines.high-definition/HDRP/Material/Lit/Lit.hlsl

     {
         // Caution: This function modify N and lightData.contactShadowIndex
         transmittance = PreEvaluatePunctualLightTransmission(lightLoopContext, posInput, distances.x, NdotL, L, bsdfData, N, lightData);
+        transmittance = lerp( bsdfData.transmittance, transmittance, lightData.shadowDimmer);
     }
 
     float3 color;