By frencha
Is there a way to render out a caustics pass separately, say like in mental ray? Or does anyone know of a relatively simple way of extracting just caustics in post?
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By Half Life
It's a relatively simple thing to do (hide refractive objects from Camera and render again) -- but the problem is without some way to distort the "caustics pass" to account for the "Index of Refraction+Geometry=Distortion" (and attenuation as well) you will never get a realistic result.

Texture/finish lost in render.


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