1. A method under control of one or more processors configured with a computer-readable memory device storing executable instructions, the method comprising: rendering points on surfaces in a scene that includes global light transport; determining attributes associated with each of the points, the attributes including at least a first portion of the attributes and a second portion of the attributes; training a first point regression function based on the first portion of the attributes to create a first trained model, the first point regression function mapping the first portion of the attributes to at least a first component of indirect light; and training a second point regression function based on the second portion of the attributes to create a second trained model, the second point regression function mapping the second portion of the attributes to at least a second component of indirect light.