Hardware-Accelerated Colored Stochastic Shadow Maps
"Hardware-Accelerated Colored Stochastic Shadow Maps"
Morgan McGuire (NVIDIA), in NVIDIA Technical Report NVR-2010-003, May 2010
|Research Area:||3D Graphics|
|Author(s):||Morgan McGuire (NVIDIA)|
This paper extends the stochastic transparency algorithm that models partial coverage to also model wavelength-varying transmission. It then applies this to the problem of casting shadows between any combination of opaque, colored transmissive, and partially covered (i.e., alpha-matted) surfaces in a manner compatible with existing hardware shadow mapping techniques. Colored Stochastic Shadow Maps have a similar resolution and performance profile to traditional shadow maps, however they require a wider filter in colored areas to reduce hue variation.