The only visual effect that could be rendered with direct illumination only 2 points (without global illumination) is caustics color bleeding shadows specular highlights ambient occlusion Russian Roulette is a technique used to sample in an unbiased manner. path length BRDFs triangles hemispheres the domain of the integrand Which of the following notations includes all the light paths depicted * 3 poir below? Learn about the Keene star (the usage of the asterisk below) in this page introducing regular expressions: https://www.codecademy.com/learn/introductionto-regular-expressions/modules/intro-to-regex/cheatsheet LD *SE LDSE LDDSE LDSE LSE In importance sampling, the less important (e.g. lower-valued) portions of 3 points a function are sampled and given weight. less ... less more ... less less ... more more ... more