Why does the mirror material not consider the fresnel reflection?

[Stephen_Wasilewski]

Hi,

See this post:

Directional reflectance of glass

Hi Chris, Radiance doesn't find the illumination of the sun off the glass material because the sun is too small to locate with random (Monte Carlo) sampling. The "mirror" type is the one to use, and you can account for the effect of angle on reflection by including an appropriate brightfunc pattern. Assuming standard 88% transmittance glass, this would be: void glass glass_alt_mat 0 3 0.96 0.96 0.96 void brightfunc glass_angular_effect 2 A1+(1-A1)*(exp(-5.85*Rdot)-0.00287989916) . 0 1 …