Draw a pool of cheap candidates, then pick one from the pool with probability proportional to a better target function. Approximates sampling from a distribution you cannot sample from directly.
supersedescorrects · extends
classifiesspecializes · part-of
substitutes forapproximates · alternative-to
depends onrequires · validates
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extendsadds capability to Importance Samplingapproximates a pdf that cannot be sampled directly
Referenced by
specializesReSTIR is a specific case of thisreuses candidate pools across pixels and frames
References
Importance Resampling for Global Illumination — Talbot, Cline, Egbert — 2005