V-Ray turns off undo queue?

[snivlem]

Hi,

I guess it's there for a reason, but in the unlikey chance it is not. Is there a reason why V-Ray turns off undo queue while rendering? Or perhaps this is even Maya doing this.

From memory it never did this in the past.

Kind Regards,

[vlado]

Undo works fine for me and I don't think we do anything to disable it. Do you have some more information how to reproduce the situation?

Best regards,
Vlado

[Ekenryd]

It's probably maya related, I have had this bug in both maya 2011 and 2012, with or without vray. From what I've heard, it turns off the undo when you press a certain combination of buttons, maybe the render button is one of them.

[snivlem]

Hi guys,

I have discovered a little more, when V-Ray uses Maya's Render View it is possible to use the undo command while rendering. However when using the V-Ray Framebuffer, during a render, it seems that something is turning off the undo queue.

When the render is finished, the undo queue turns back on.

This only affects V-Ray, RT does not have this issue.

Maya 2013.5x64 and any recent V-Ray should be able to replicate the issue.

It's not really a huge problem though.

Cheers.

[treyharrell]

I'd found in the past that if you have more than one VRayEnvironmentPreview node in your scene, a mel error isn't caught properly and kills the undo queue.

I patched the vrayRenderLayerChangedCallback script, and wrapped catchQuiets around the editRenderLayerGlobals statements to fix it.

Basically the proc does undoInfo -stateWithoutFlush off/on at the head and tail.

Hope this helps,

--T