GPU Pro 4

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IV

Real-Time Deep Shadow Maps

Ren´eF¨urst, Oliver Mattausch, and Daniel Scherzer

In offline rendering the algorithm of choice for correctly shadowing transparent

objects such as hair or smoke are deep shadow maps (DSMs). Algorithms try-

ing to achieve the same effect in real time have hitherto always been limited

to approximating the solution by depth-peeling techniques. Since the introduc-

tion of Direct3D 11, however, it has become feasible to implement the original

algorithm using a single rendering pass from the light without introducing any

approximations. In this chapter we discuss how to implement a DSM algorithm

for rendering complex hair models ...