Filtered Shadow Mapping

摘要

A layered, filtered shadow mapping algorithm may be used for motion blurred shadows. The algorithm is divided into two passes, namely a shadow pass and a lighting pass. The shadow pass renders the scene using stochastic rasterization and generates a time-dependent shadow map augmented with per-sample motion vectors. The subsequent lighting pass renders the scene from the camera's point of view, and performs a shadow query for each sample seen from the camera.

主权项

1. A method comprising:
splitting shadow map samples into screen space tiles; splitting one of said screen space tile into depth layers; calculating an average motion vector for said depth layers; and reprojecting samples within a depth layer along an average motion vector to a common time.