Path Tracing

• Like Raytracing but never spawn secondary rays, just have one ray that bounces around

• by material properties and chance becomes either a reflective or refractive ray

• Ray bounces until light source or max bounces are reached

• If no light source was found, contribute Black

• Generate many rays per pixel

Problems #

Path tracing suffers from generating noise. This is because the ray bounces are chaotic. A small variation of ray direction can bounce to completely other objects.