Systems and methods for estimating light transport between respective points includes selecting a plurality of first sub-paths extending the first point A, and selecting a plurality of second sub-paths extending from a second point B. A plurality of transport paths are constructed, wherein each one of the plurality of the first sub-paths is coupled to a respective one of the plurality of second paths, and wherein each transport path comprises one first sub-path and one second sub-path. Two or more of the transport paths are sampled, and a light transport value for each of the sampled transport paths is calculated to estimate the light transported between first point A and second point B.