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This image is quite hard to see due to heavy caustics, however, I haven't had to render in Cycles since Blender 2.72 came out, and I can't for the life of me find 'no caustics'.

I tried un-checking the two boxes that looked like they took it's place, but that didn't seem to change anything.

enter image description here

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1 Answer 1

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It looks like this option was changed a bit. You can enable/disable caustics from reflections and from refraction (when light goes through transparent materials) separatly.

Just disable "Reflective Caustics" and "Refractive Caustics" in the Light Paths tab of the render settings.

enter image description here

UPDATE:

It seems that these settings do not work if you are using Branched Path Tracing. You can however play around with the Clamp Indirect value to trunkate high light values produced by reflected light.

enter image description here

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  • $\begingroup$ I got no change. is there anything else? $\endgroup$
    – ruckus
    Commented Nov 28, 2014 at 17:05
  • $\begingroup$ When I tested it disabling reflective caustitcs reduced the noise created by rough glossy surfaces effectively. You can also try to increase the Filter Glossy value beneath the checkboxes. Otherwise I think you can only increase the number of samples. $\endgroup$
    – maddin45
    Commented Nov 29, 2014 at 15:14
  • $\begingroup$ You can find the sampling settings in the Sampling tab (usually 2nd tab above Light Paths). If you are using normal Path Tracing you can set the samples for the 3D viewport preview and the final render, if you are using Branched Path Tracing the options become a lot more dificult. $\endgroup$
    – maddin45
    Commented Dec 1, 2014 at 17:27
  • $\begingroup$ I found out that for Branched Path Tracing the light paths settings seem to have no influence. I updated my answer accordingly. $\endgroup$
    – maddin45
    Commented Dec 1, 2014 at 17:38
  • $\begingroup$ Yeah I don't know what the deal is, I put sampling up to 150, disabled everything, used integrator presets, pumped filter glassy as high as i could, but nothing helped. Also I can't upload pasteall is dead. Sorry folks, i'll accept anywho. $\endgroup$
    – ruckus
    Commented Dec 1, 2014 at 22:55

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