This is slightly tricky to explain, but basically I can’t find a workable way to use VRay Dirt on thin objects without doing something like deleting the back face, which isn’t ideal. Would it be possible to have a setting/tick box that allows you to exclude each object from calculating itself… Not sure how else to explain myself, perhaps a picture would help.
Yes, we have this option in Maya, should not be too hard to bring it to 3ds Max.
Best regards,
Vlado
Fantastic. Thanks Vlado.
Any news on when we will see this?
+1 on this
is this what is causing my problem here:
http://www.chaosgroup.com/forums/vbulletin/showthread.php?70314-vray-dirt-odd-gaps
doesnt look like the same effect but might somehow explain it…?
guess a test without backfaces is in order, although not an option really as its a refractive object.
Try deleting the back faces to see what results you get. Could possibly be causing your problem. I’d love to see this feature introduced though.
turns out there seems to be an issue with using vray dirt in the refraction slot, you have to turn on “consider for gi” in the vraydirt settings or you get the errors i was seeing..
Any news on when we will see this?
Unfortunately, not yet.
I hope it will be implemented soon.
I pretty much always have that turned on anyway, as I like to see the dirt in the light cache previews. Shame there’s no news on when it’ll be implimented. Looking forward to getting a lot more use out of it when it is.
Guys, it’s been a while. Any update? Will this make it in to 3.0?
Nobody at all?
Hello,
Unfortunately it is not fixed yet - I’ll inform our developers about it.
Thank you 
Would be such a useful feature to have in VRay 3.0; I could then really start using it on almost everything.
Still nothing then?
I just checked the status of the issue and it is still opened. We will keep you posted.