Lecture 13: Global Illumination & Path Tracing (34)
JiaweiChenKodomo

The reflection operator is linear. The transport operator is not.

elizabethyli

That's a really interesting observation, and I think it makes a lot of sense given the meaning of each operation. The reflection operator is defined mostly by the physics of light, with the path that the rays travel very systematic and logical. On the other hand, the transport operator essentially truncates the path of the ray at some random point in space, wherever objects happen to be in the scene.

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