(GGX BRDF, with BRDF Importance Sampling)
(Nearest Event Estimation)
(Uniform Hemisphere Sampling)
(Cosine Importance Sampling)
(BRDF Importance Sampling)
(9 Uniform Random Light Sampling)
(3x3 Stratified Light Sampling)
(Analytic Direct Lighting, No Sampling)
(Cosine Importance Sampling)
(BRDF Importance Sampling)
(Blinn-Phong Specular Reflections)
(Blinn-Phong Diffuse Lighting)
(Blinn-Phong Cornell Box)
(BVH Visualization)