Black spots with Light mix

[luca_militello]

Goodmorning everyone,
With the latest version of Vray (5.2.3) and Sketchup 2022, I noticed that when I move from RGB properties to Lightmix these black spots appear as in attached screenshots.
My computer is an iMac Pro (2017) with Monterey 12.0.1

RGB


Lightmix

[luca_militello]

I think it's a bug with IES Light and Spotlight with the newest version.
When I have the time I post other screenshot.

[slavcho.brusev]

Hi,

Can you share a vrimage file so I can check?
Additionally, can you share a simplified version of the file(skp) where this is still happening for me to check?
If this is ok with you, please use the Pack Project tool(Extensions > V-Ray > Pack Project) and send it via the link below
https://support.chaos.com/hc/en-us/requests/new

Thanks!

[luca_militello]

I submitted everything via the link you gave me. Thank you very much, I look forward to your feedback

[agentorange_cg]

I'm having this problem too on the latest version of Vray and Sketchup.... again they appear on the Lightmix but not when I do a screen render...

[slavcho.brusev]

Hi luca_militello

I have tried to reproduce the spots with the file you send me, but it seems they are not appearing on my side.
Are there other specific steps to take or is it just switching between RBG and Lightmix in the Frame Buffer?

[photohomka]

I've got something similar once when I turned off selfillumination in the lightmix, then no matter if it was on or off the selfilumination materials appeared black.

[luca_militello]

Hi luca_militello

I have tried to reproduce the spots with the file you send me, but it seems they are not appearing on my side.
Are there other specific steps to take or is it just switching between RBG and Lightmix in the Frame Buffer?

No I don't take any specific steps, I just switching between RBG and Lightmix in the Frame Buffer
I upload the vrimg.

https://we.tl/t-xN7gBFJ5ku

[slavcho.brusev]

Thank you for the files!
The issue stems from IES file with wrong data.
To resolve the issue stop "IES Light LAD X6" or replace the IES file of this light with another one.
Let me know if this worked on your side.

[slavcho.brusev]

For anyone experiencing similar issues. Please send an example SketchUp model(packing it with the Pack Project tool: Extensions > V-Ray > Pack Project) plus the .vrimage output example.
And submit it at the following link: https://support.chaos.com/hc/en-us/requests/new