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Ray tracing has established itself in recent years as the most general image-synthesis algorithm [10]. Researchers have investigated ray-surface intersection calculations for a number of surface primitives. These have included checkerboards [Whitted 80]; chrome balls [Whitted 80]; glass balls [Whitted 80]; robot arms [Barr 82]; blue abstract things [Hanrahan 82]; more glass balls [Watterberg 83]; mandrills [Watterberg 83]; more mandrills [Sweeney 83]; green fractal hills [Kajiya 83]; more glass balls [SEDIC 83]; aquatic blobby things [Kaw 83]; more chrome balls [Heckbert 83]; pool balls [Porter 84]; more glass balls [Kajiya 86].

Unfortunately, nobody has ray traced any food. So far, the most realistic foods were Blinn’s classic orange and strawberry images, but these were created with a scanline algorithm [2]. The Dessert Realism Project at Pixar is addressing this problem. This article presents new technology for ray tracing a restricted class of dessert foods, in particular Jell-O-brand gelatin. We believe this method may have application to other brands of gelatin and, perhaps, pudding as well.

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