File:Recursive_raytrace_of_a_sphere.png · Wikimedia Commons · See Wikimedia Commons
ray tracing
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rendering algorithm that works by sending out many virtual rays of light
~40 min read
Encyclopedic overview
This recursive ray tracing of reflective colored spheres on a white surface demonstrates the effects of shallow depth of field, "area" light sources, and diffuse interreflection.
In 3D computer graphics, ray tracing is a technique for modeling light transport for use in a wide variety of rendering algorithms for generating digital images.
Excerpted from Wikipedia’s “ray tracing” article, available under the CC BY-SA 4.0 licence.