Vray GPU bug - Mat ID in Multimatte doesnt work in a Vray Blend Material

[squintnic]

As per title - Mat ID in Multimatte doesnt seem to work in a Vray Blend Material.

Trying generate a matte from a b+w image and gradient ramp insuide a vray comptex that sits in the blend map slot.

This works on Vray CPU

every single job I do throws up a basic roadblock on vray GPU, kind of a running joke now.

[hermit.crab]

Thanks for the report. I've logged the issue (internal bug-tracker id: VGPU-5561) for developer investigation.

[squintnic]

Thanks, small bug but a annoyion one. ended up back on CPU for this shot

[nicolas_fuminier]

Hello,

Any update on the issue ?
It seems to be still there in 52023 and we use a lot of blend material and ID passes

Thanks,
Best

[Muhammed_Hamed]

It is related to the Render Elements not working behind glass, I'm not sure if this is easier to fix or not. I left a note for our devs
Both requests are high priority for some time now

Best,
Muhammed