A technique to generate an image from a geometric model of an object. For each pixel in an image, a theoretical ray is cast from the observer’s viewpoint into the model to determine what part of the model should be displayed at that point in the...

Ray tracing is a general technique from geometrical optics of modeling the path taken by light by following rays of light as they interact with optical surfaces. It is used in the design of optical systems, such as camera lenses, microscopes, telescopes...