Emission Test

Figure 1: Overview and solution for the emission test case.

This scene is composed of two rectangular lights illuminating a ground plane. The right rectangular lights is tessellated into 10 by 10 polygons, and the left is a single polygon (Figure 1). The scene tests accurate unoccluded transfer from lights to receivers. In particular, it checks sampling algorithms and that the effect of the 100 small lights is equal to the the single large light. The symmetry of the image allows a simple sanity check by flipping the image across the vertical axis and comparing it with itself.

Most algorithm methods should be able to compute an arbitrarily accurate solution to this environment given enough time. Mesh-based approaches may have some trouble with the singularity at the corners, and algorithms that draw samples from the light may have trouble as the distance to the light goes to zero.