Christopher James Huff wrote:
>This is pyramid tracing, related to beam or cone tracing. It will be
>slower and probably a lot more limited than using multiple rays to
>sample the area. I think they are used in acoustics simulations though...

I'm googling about it, and as you said they are focused in acoustics
simulations. This is a good start anyway.
A link or reference to something related to 3d rendering would be of great
help.

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