Now that you've learned more about modeling the physical interaction of light with transparent materials in the lecture on reflection, what would you say about the physical accuracy of alpha blending? Consider a surface S which reflects 50% of incident light using a lambertian brdf (rho = 0.5), and allows 50% of the light to be transmitted through the surface. What would a path tracer compute if such a surface was placed over another opaque object? Would it look the same as the result given by alpha compositing?
Now that you've learned more about modeling the physical interaction of light with transparent materials in the lecture on reflection, what would you say about the physical accuracy of alpha blending? Consider a surface S which reflects 50% of incident light using a lambertian brdf (rho = 0.5), and allows 50% of the light to be transmitted through the surface. What would a path tracer compute if such a surface was placed over another opaque object? Would it look the same as the result given by alpha compositing?