Datensatz

Zusammenfassung

Efficient global illumination computation in dynamically
changing environments is an important practical
problem. In high-quality animation rendering
costly "final gathering" technique is commonly
used. We extend this technique into temporal domain
by exploiting coherence between the subsequent frames.
For this purpose we store previously computed
incoming radiance samples and refresh them evenly in space and
time using some aging criteria. The approach is
based upon a two-pass photon mapping algorithm with irradiance
cache, but it can be applied also in other gathering methods. The
algorithm significantly reduces the cost of expensive indirect
lighting computation and suppresses temporal aliasing
with respect to the state of the art frame-by-frame
rendering techniques.