Veach (Mesh Light), Fig. 7

The benefits of our method diminish as the amount of empty space within the sphere increases. For the thin triangle light on the right, our method exhibits 1.5 times higher error than the previous NEE method, which we list as one of our limitations. We could improve this by bounding the geometry with multiple smaller spheres. However, a further investigation of the light shape projected onto the gradient plane would be interesting.

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