Exporting vrscene issue

[lfclouds]

Hi all,

When I try exporting a vrscene everything works but VRay doesn't exit out of the batch rendering. It just sits there. I have updated the license server and found that when I remove the Maya preference file it will export out o.k. for a couple of times before VRay reverts back to the same issue. Any suggestions?

[yolov]

Does this happen with every scene, or just a particular one?
What versions of Maya and V-Ray are you using?
This is vrscene export from maya batch, correct? Does this mean you're passing the -exportFileName and -noRender flags or is the maya scene simply saved to export, instead of render?

[lfclouds]

Hi Yolov, thanks for looking into this. Yes it happens with every scene. I tested it with a new scene with only a cube and a dome light, a scene from an previous production I know worked. I have re installed a fresh copy of Maya 2023, removed the preference directory, a clean install of VRay 5 and license server but that didn't solve the issue.

When I export out multiple layers it will some times export out a number of render layers successfully and then stop on another one.

I sometimes see this message pop up but not very often "This application failed to start because no Qt platform plugin could be initialized ..."

Thanks

[lfclouds]

Following up on where we are with this issue. Someone from Chaos looked into this and was able to reproduce it. It looks like it's a bug inside VRay and they'll get back to me as soon as they have a solution.

[yolov]

Hey, sorry for the delay, we've been looking into this for some time now.
It seems we've found something not related to V-Ray. Just as an experiment - can you make sure that Arnold is NOT loaded and try again? You may have to unload it and delete any arnold nodes from the scene before saving again and/or save to a .ma and delete any mentions of "requires" and "arnold" (usually in the beginning of the file).

[lfclouds]

Hi Yolov,

Thanks for getting back to me. That's exactly what I've done. Unchecked Arnold AND Bifrost. That seems to work but that's a crude workaround and not a fix. It helps me out for now but I sure hope you guys are working on a fix for this.

[yolov]

We ... have reported it to Autodesk, since it seems to be an issue with Arnold. It looks like the latest mtoa versions will cause freezes in batch even without V-Ray.
There's nothing more we can do for now.

[lfclouds]

Hi Alex,

Thanks for letting me know. That is very interesting and important information. Is this something you can let your users know. It takes us a lot of trouble shooting when we run into issues like these and it sometimes very hard and time consuming to find the information in these forums. I love this forum but there is so much in there that it can take a lot of digging through post before we stumble on relevant information. Sending out an email with this kind of info could be very useful.

[yolov]

I'll think about it and discuss it with the teams here. Thanks for bringing it up.

[matthew999]

Arnold causing lack of exit after render has been reported on forums jere for almost a year now several times. Maybe it should be made a sticky post ontop of forum

[yolov]

Yes, I was thinking of the same - will put a sticky.

[yolov]

I've added a sticky - you can see it here - https://forums.chaos.com/forum/v-ray...wn-maya-issues

I'll update the sticky thread once we can confirm the fixes in future Maya updates.