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Shadow Mapping Tricks and Techniques
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Shadow Mapping Tricks and Techniques,
1616

Programming, Lecture

John Isidoro
Staff Engineer, ATI Research Inc.
Shadow mapping is a powerful technique for shadow computation, and is rapidly becoming prevalent in next generation games due to the ubiquitousness of high precision pixel shading capabilities in modern graphics hardware. However, shadow mapping algorithms are often plagued by blocky aliasing artifacts and precision based bias issues. This talk describes a variety of shader based methods to improve both the filtering quality and the performance of shadow mapping algorithms in order to alleviate these problems in an efficient manner. A variety of approaches will be compared and contrasted, and a number of small but novel improvements to each algorithm will be discussed.

The main takeaway idea from this talk is that small subtle tweaks on the existing algorithms can result in noticeable improvements in both the appearance and performance of shadow mapping.

This talk is beneficial to game programmers who are using shadow mapping, and are looking to improve both its performance and appearance. A working knowledge of both shadow mapping and programmable graphics hardware is required to get the most out of this presentation.

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