vrimg2exr and material id

[YoyoBoy]

I can't seem to get vrimg2exr to put a material id channel into the exr file. It works fine if I make it split layers out into separate files, but it won't include that channel in a combined exr. I also tried using the demo of latest version of ProEXR on the vrimg files, but that can't see the material id channel either.

If I open the vrimg files in the VRay Frame buffer, everything is there.

Thanks.

[joconnell]

Have you got multiple material ID channels? I found with channels that had the same name as others, one would often overwrite the other in the final EXR as seen in nuke.

[YoyoBoy]

I just have one material id channel. I just rendered out a separate pass, so I'm getting around the problem for now.

[joconnell]

EXR's sometimes seemed to be funny about channel names when they're tagged internally according to instinct - as an example I had the same issue with two vrayzdepth elements looking fine in the buffer but one disappearing in the converted exrs!

[YoyoBoy]

I guess I should have mentioned that I also have Z-Depth and Velocity elements as well. I wonder if it matters what order I put the render elements in... no time to test that now, maybe later.

[vlado]

Which program do you use to open the resulting .exr file? The material ID channel is an integer channel (not a RGB one) and programs like PhotoShop may have problems to understand it.

Best regards,
Vlado

[YoyoBoy]

I am using the latest version of AfterEffects.

[jacksc02]

Could you just render to 32bit EXR rather than VRimg?

[Zdravko]

Would it be possible to send us the .vrimg file and an example scene with your setup to: support@chaosgroup.com
so we could investigate the issue further on. Also please include the V-Ray version that you are using.