sekow Posted November 12, 2015 Share Posted November 12, 2015 (edited) hey, Ive noticed that when I am adding two pbrspecular vops together, one for reflection the other for refraction I am getting rendertimes that are 4 times longer than rendering without reflection. Ive set up the reflection limit to 1, refraction is on 5. Reflection rays getting trapped in refraction, I guess. I am aware of refraction being expensive, but how do you cope with refracting objects? Edited November 12, 2015 by sekow Quote Link to comment Share on other sites More sharing options...
fathom Posted November 12, 2015 Share Posted November 12, 2015 yeah, you're probably tracing to the far side of your object which also traces a reflection back into the object which then refracts some more. not sure why it's 4 times and not just double... you can play with your reflection/refraction scoping to eliminate things to help speed stuff up. Quote Link to comment Share on other sites More sharing options...
sekow Posted November 12, 2015 Author Share Posted November 12, 2015 good point. thanks! Quote Link to comment Share on other sites More sharing options...
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