Texture Space Caching and Reconstruction for Ray Tracing

摘要

We present a texture space caching and reconstruction system forrnMonte Carlo ray tracing. Our system gathers and filters shadingrnon-demand, including querying secondary rays, directly within arnfilter footprint around the current shading point. We shade on localrngrids in texture space with primary visibility decoupled from shading.rnUnique filters can be applied per material, where any termsrnof the shader can be chosen to be included in each kernel. Thisrnis a departure from recent screen space image reconstruction techniques,rnwhich typically use a single, complex kernel with a set ofrnlarge auxiliary guide images as input. We show a number of highperformancernuse cases for our system, including interactive denoisingrnof Monte Carlo ray tracing with motion/defocus blur, spatialrnand temporal shading reuse, cached product importance sampling,rnand filters based on linear regression in texture space.