Vray 2.40.04 for 3ds Max visible to camera bug

[LudvikKoutny]

Hi,

Ever since Vray 2.40.04 and a few nightly builds preceding i am encountering a bug where when objects have disabled camera visibility, there are some ghost black artifacts remaining after them. I do not remember such problems in version 2.30 and earlier.

I am attaching pictures. I tried to email Vlado directly at vlado@chaosgroup.com with the scene attached, but both my mails returned with Error: message file too big.

[jacksc02]

That problem has been around for a long time.
It happens because of intersecting geometry.
You can increase the secondary ray bias slightly (.01) and it should fix some of the problem

[LudvikKoutny]

That problem has been around for a long time.
It happens because of intersecting geometry.
You can increase the secondary ray bias slightly (.01) and it should fix some of the problem

Thanks a lot, i just started to notice it after Vray update, so maybe it is just a coincidence.

[LudvikKoutny]

Just tried secondary ray bias values of 0.01, 0.1 and 1 but it did not help. It changed the appearance of those artifacts a little, but did not remove them.

[GLASS-CANVAS]

I can confirm that this bug has been around for ages.

[LudvikKoutny]

Yes, probably true, seems like this was a first time i tried to hide visibility of some very complex objects to camera.

[vlado]

Just increase the max. transparency levels in the Global switches rollout and it will be fine.

Best regards,
Vlado

[alexyork]

Just increase the max. transparency levels in the Global switches rollout and it will be fine.

Best regards,
Vlado

Except that that might have a very negative impact on rendertimes and undesirable visual appearance. Good to know this as a workaround though.