At every path vertex, additionally sample a point on a light and trace a shadow ray to it, rather than waiting for the random walk to wander onto an emitter by chance.
supersedescorrects · extends
classifiesspecializes · part-of
substitutes forapproximates · alternative-to
depends onrequires · validates
Colour is the family; a dashed line is the second member of it.
Drag to pan · scroll to zoom · click a node to open it
This node
correctsfixes a defect in Path Tracingrandom walks almost never hit small light sources
Referenced by
extendsMany-Light Sampling adds capability to thispicks which light to sample when there are thousands
correctsMultiple Importance Sampling fixes a defect in thislight sampling alone is terrible on near-specular surfaces
specializesRay-Traced Shadows is a specific case of thisthe visibility term of a direct lighting sample