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Modern graphics APIs such as DirectX 12 expose low-level hardware access and control to developers, often resulting in complex and verbose code that can be intimidating for novices. In this chapter, we hope to demystify the steps to set up and use DirectX for ray tracing.

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In this chapter, we discuss a pragmatic approach to real-time supersampling that extends commonly used temporal antialiasing techniques with adaptive ray tracing. The algorithm conforms to the constraints of a commercial game engine, removes blurring and ghosting artifacts associated with standard temporal antialiasing, and achieves quality approaching 16× supersampling of geometry, shading, and materials within the 16 ms frame budget required of most games.