A technique used in computer graphics to create realistic images by calculating the paths taken by rays of light entering the observer's eye at different angles. The paths are traced backwards from the viewpoint, through a point (a pixel) in the image plane until they hit some object in the scene or go off to infinity.
BMRT is a ray tracer that supports such features as ray traced reflections and shadows; area lights; texture, environment, and shadow mapping; and fully programmable surface, displacement, light, and volume shaders.
Papers, publications and other research relating to ray tracing.