thin smooth dielectric use luma coeff from interaction

Author: keptsecret

include/nbl/builtin/hlsl/bxdf/transmission/smooth_dielectric.hlsl

@@ -121,7 +121,7 @@ struct SThinSmoothDielectric
         const spectral_type reflectance = fresnel::thinDielectricInfiniteScatter<spectral_type>(fresnel(interaction.getNdotV(_clamp)));
 
         // we are only allowed one choice for the entire ray, so make the probability a weighted sum
-        const scalar_type reflectionProb = nbl::hlsl::dot<spectral_type>(reflectance, luminosityContributionHint);
+        const scalar_type reflectionProb = nbl::hlsl::dot<spectral_type>(reflectance, interaction.getLuminosityContributionHint());
 
         scalar_type rcpChoiceProb;
         scalar_type z = u.z;
@@ -161,7 +161,7 @@ struct SThinSmoothDielectric
         const spectral_type reflectance = fresnel::thinDielectricInfiniteScatter<spectral_type>(fresnel(interaction.getNdotV(_clamp)));
         const spectral_type sampleValue = hlsl::mix(reflectance, hlsl::promote<spectral_type>(1.0) - reflectance, transmitted);
 
-        const scalar_type sampleProb = nbl::hlsl::dot<spectral_type>(sampleValue,luminosityContributionHint);
+        const scalar_type sampleProb = nbl::hlsl::dot<spectral_type>(sampleValue,interaction.getLuminosityContributionHint());
 
         const scalar_type _pdf = bit_cast<scalar_type, uint32_t>(numeric_limits<scalar_type>::infinity);
         return quotient_pdf_type::create(sampleValue / sampleProb, _pdf);
@@ -172,7 +172,6 @@ struct SThinSmoothDielectric
     }
 
     fresnel::Dielectric<spectral_type> fresnel;
-    spectral_type luminosityContributionHint;
 };
 
 }