boundaries and placed into buckets based on their location. Each bucket is diced and drawn individually, and the data from the previous bucket is discarded before the next bucket is processed. In this way only a frame buffer for the current bucket and the high-level descriptions of all geometric primitives must be maintained in memory. For typical scenes, this leads to a significant reduction in memory usage compared to the unmodified Reyes algorithm. Reyes renderers The following renderers use the Reyes algorithm in one way or the other or at least allow users to select it to produce their images: Digits 'n Art's 3Delight (link) Aqsis (link) open source jrMan (link) open source Pixar's RenderMan Pro Server & RenderMan for Maya (link) up to version 20 (released in 2015) Pixels 3d Renderer (link) Pixie (link) open source DotC Software's RenderDotC (link) Side Effects Software's Mantra (link) Poser's FireFly (link) Bakery Relight (link) References Robert L. Cook., Loren Carpenter, and Edwin Catmull. "The Reyes Image Rendering Architecture." Computer Graphics (SIGGRAPH '87 Proceedings), pp. 95–102. Anthony A. Apodaca and Larry Gritz. Advanced RenderMan: Creating CGI for Motion Pictures. Morgan Kaufmann Publishers. External links REYES, Primitives & Some Philosophy Welcome to Renderman: Reyes 3D rendering