> That would use huge amounts of memory, and I'm not sure how useful it
> would be.
> 30 floats and 2 pointers: 256 bytes for one node. The number of nodes
> possible is 2^max depth. At the default of 7, that's 128 nodes, or 32KB
> for one pixel sample. At 1024*768, that's 32MB a line, 24.6GB total.

I wasn't talking about saving the whole rays history.. Just adding options
to output one or more kind of pixel contribution (diffuse, radiosity,
photons, etc) as a separate image. Exactly as in the post-process patch ,
but instead of keeping depth, normal, etc we'll keep diffuse, highlights, or
whatever the user asks for. So i don't think the memory overhead would be
too important.
Now you're right maybe those separate layers will not be that useful

M

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