REFRACTIVE CAUSTIC with Vray Sun

[NEXILIS]

Hi all,

is there anyone that knows how to reduce artefact of refractive caustic
with vray sun trough a glass material. see attached example.

i tried a material wrapper on a glass material with unchecked generate caustic but it don’t work.

Vray 1.5 SP5 Max2011

thanks for your help.

[joconnell]

I could be wrong but is there any chance that’s a GI error?

[MoonDoggie]

Those don’t look like caustics. Those look like GI as Jo said. IF they were refractive caustics, you could turn them off by turning off “Generate Caustics” for your lights

[NEXILIS]

thanks for your reply, but i d’ont understand why Vray sun trough glass material make
this GI artefact i always used the same GI settings , i’ve read in another thread that a big
clear surface can make this results, and indeed I’ve a big white wall just behind the glass
material (on the left in black in the attachement.)
is there a solution for you ?

[jacksc02]

Something looks odd there. It almost looks like your not using GI.
Could you post up your settings?

[NEXILIS]

Here are my GI and lights settings
Thanks.