Shadow cacher alpha problems

[Robert]

I'm not sure why but I get huge artifacts that flicker from frame to frame in shader catcher alpha channel. Never had that before.
Its just a plane with Subdivision. Can't find the reason. Check attached image.

[Robert]

So only thing I found is, that it has to do with light passing through a shader with refraction...

[Robert]

Ok, found the bug. It is the Light cache,
I wen through different settings, but it seems sticky.
Hope the developers find time to fix that bug. Already wasted a lot money on the render farm to find it. Got a bad feeling about that.

[boyan]

Hey, Robert,

Thank you for the post. May, I have the scene file for verification? BTW, Did you try with V-Ray Infinity plane instead of modo mesh?

Cheers,

[Robert]

The shadow catcher geometry is not a simple plane. I send you the file to check it out.

[Robert]

Ok, I see this again in my current project. Stupid squares in the alpha. Very annoying. Still no fix?

[boyan]

Hey, Robert,

I've sent an e-mail a month ago, about how to fix the flickering. This might be the same behavior --> Check the LC settings.

[Robert]

Yes I remember, but it didn’t helped. I send you a newer case, if you want..

[boyan]

I think the animation issue with flickering has gone with the scene which I sent back to you. Could you please, check with the latest one nightlies build with 4.20.90 signature?

I keep the last one if it is the same.

Cheers,

[Robert]

I will do.. the latest nightly is 4. October and the latest change is from march.. Not sure if that changes anything.
Its all 3.7 for Modo. no 4.x in the list

[vladimir.nedev]

The V-Ray Next for Modo nightly builds are here : https://nightlies.chaosgroup.com/mai...y4modo/nightly
If you don't see them, it means you don't have access and you have to send an e-mail to support@chaosgroup.com requesting access.

Greetings,
Vladimir Nedev

[vladimir.nedev]

and the latest change is from march.. Not sure if that changes anything.

I cannot include all fixes from the core in the change-log.
Usually it's only V-Ray for Modo specific fixes or core fixes that were reported by V-Ray for Modo users, but it's possible that I've missed some of these.

Greetings,
Vladimir Nedev

[Robert]

Ah ok, I requested now.