Diffuse model Raytrace

sat · Post by **sat** » Thu Jan 17, 2008 3:42 pm

Hello,

does it make sense to render glass (for example windows) with the diffuse model raytrace instead of photon mapping? Will it speed up the render process? Thanks in advance.

acidarrow · Post by **acidarrow** » Thu Jan 17, 2008 4:47 pm

Hi,

I'm not sure, but sounds interesting enough to do some tests on it, will report the results once I'm done (may take a while though)

Captain Obvious · Post by **Captain Obvious** » Thu Jan 17, 2008 5:17 pm

No. Glass shouldn't have any diffuse anyway, and GI is only calculated for surfaces that have nonzero diffuse and color.

sat · Post by **sat** » Fri Jan 18, 2008 10:10 am

Thanks.

keeejreeej · Post by **keeejreeej** » Fri Jan 18, 2008 11:42 am

So, should glass be set to specific diffuse model (raytrace) or not?
And what about "Control FG Rays"?

Captain Obvious · Post by **Captain Obvious** » Fri Jan 18, 2008 2:15 pm

Unless you have diffuse on your glass (which you shouldn't!), there's no need to do anything.

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Diffuse model Raytrace

Diffuse model Raytrace