Ray Tracing Decals

Abstract

This chapter discusses several different approaches to implementing decals in ray tracing. These approaches vary between the use of triangle meshes versus procedural geometry and support for single versus multiple decals per surface point. Additional features are also discussed for using decals in production, as well as a number of possible optimizations. The discussion is supported by performance measurements to give the reader an idea of the cost of the different ray tracing techniques, in hope that this inspires selection of the best technique whether for decals or other applicable ray tracing effects.