Mental Ray FG problem

[frog]

Have you tried changing your FG radius settings?

If you're using 3dsmax have look at the samples on http://www.jeffpatton.net/ they're very helpful for understanding Mental Ray.

Also the Mental Ray shader discussion is joly useful:

http://www.cgtalk.com/showthread.php?t=104578

[.src.visualisation]

It just might be a case of rebuilding the FG calculation - I've found this kind of artifacts if I have moved the model and used the previously saved FG calc.

I'm no expert by any means - you may well have tried that already, and don't know what to suggest if that's not it.

[Morguez]

Thank you Frog and Src.
I read jeff patton's site, I didn't move the scene but the problem remains the same

Anyway thx again :)

[frog]

Those artifacts are definitely related to the Final Gathering min and max radius settings. I sometimes see them and the only way to get rid of them is to reduce the radius by quite a lot. Unfortunately this makes render times go up.

[Morguez]

I'll try that Frog thx very much

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