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> Well, I'd define classic as standard "from camera" outwards. Fair enough. I was thinking of optical ray tracing, not graphic ray tracing. In optical ray trac
by lutusp 13y ago
> Well, I'd define classic as standard "from camera" outwards.
Fair enough. I was thinking of optical ray tracing, not graphic ray tracing. In optical ray tracing the point is to analyze the paths of light beams through lenses and from mirrors, not the POV of a camera necessarily.
I've been able to get pretty useful optical ray tracing out of Pov-Ray:
http://www.arachnoid.com/raytracing/csg.html http://www.arachnoid.com/raytracing/csg.html (note the animation toward the bottom of the page).
- berkut 13y agoYeah, I work in the VFX industry, so I'm a bit biased :) Cool - actually, that would be a lot less computationally expensive (assuming you just modelled the sun as a disc) tracing it backwards without any GI at all. Photon mapping's pretty similar though, you've just got a final gather process at the end of sending out the light rays. The difference is photon mapping records all the hits to all surfaces. If you limited it to specular ones (at least for the first ray bounce) you'd probably have something very similar.
- sampo 13y agoThis is what I tried to say 5 or 6 messages ago, when I first replied to you.