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I've been experimenting with caustics trying to find the best method currently with Vray. From what I can tell Vray RT and Progressive Path Tracing do not create refractive caustics (please correct me if I'm missing something), and BDPT creates both refractive and reflective caustics but has some other problems that don't make it suitable for production yet. So basically that leaves the caustics photon map, which works well provided the emitter settings are high enough. Is that the best option? I'm trying to get as close to an unbiased renderer as possible.
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I think Bertrabd Benoit had a nice tutorial on the caustics on his blog so maybe start there? To me good caustics is still a bit complicated to create and are always connected to creating special light to drive them.Martin
http://www.pixelbox.cz -
Thanks for the tip, I did a search on his blog but could not find the tutorial, do you have a link by any chance?Comment
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Vlado, any advice on what is currently the best method (ie the most realistic, while still production friendly) for achieving caustics? Regards.Last edited by Rob Burns; 12-06-2016, 11:33 AM.Comment
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This is the tutorial Martin is referring to: http://www.3dtotal.com/tutorial/1039...rdo-eloy-videoComment
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Ok thank you, I did find that tutorial and tested the method out this morning (I guess I was expecting a tutorial by BB). For a similar level of sharpness in the caustics the method is faster, but I think the results are less realistic. Here are 2 examples, the first one is using the vray scene lights for caustics, the second image is the faked version described in the tutorial, which does not give a good result IMO. I'm looking for the most correct or realistic result, even if it takes longer to render.
Caustics with Vray IES light: 5000 photons, 3min 25sec
Faked with Max light: 2000 photons 2min 04sec
Last edited by Rob Burns; 12-06-2016, 12:03 PM.Comment
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For anyone interested here are a bunch of tests I did using the caustics map, PPT, BDPT, and Vray RT CPU and GPU:
Last edited by Rob Burns; 12-06-2016, 12:11 PM.Comment
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