Multichannel EXR do not save correctly

[yavor.rubenov]

A freelancer we have been booking for years has excatly the same problem recently: Corrupted Multichannel EXR when saving region renders at very high res. The files are below 30kb as well.

Granted, it is the same project, but a totally different machine and network.
Something is severely broken with saving of Multichannel EXR in very high resolution.

Can you get me a scene that does that for you ? I don't need any geometry or materials - a simple teapot will do
I'll need the render elements, V-Ray Settings and the very high resolution giving you troubles.


Best regards,
Yavor

[kosso_olli]

Also from your first post I noticed you are not using the latest official version of V-Ray found

I already tried the latest version of V-Ray for Max 2025, as stated a few posts above.
Same issue there, I can provoke that error on any machine in our offices. Even the freelancers are able to reproduce it.

[kosso_olli]

Can you get me a scene that does that for you ? I don't need any geometry or materials - a simple teapot will do
I'll need the render elements, V-Ray Settings and the very high resolution giving you troubles.


Best regards,
Yavor

Hey Yavor,
scene file was sent to you via eMail, thanks!

Regards

Oliver

[yavor.rubenov]

Downloading, thanks.

[yavor.rubenov]

Thanks to the provided scene we found the bug - saving to exr + region + Filmic tonemap leads to a silent crash while writing the exr (internal-ID VFB-94). We'll try to get a fix for this soon.

[kosso_olli]

Thank you so much!

[kosso_olli]

Hey guys,
is there any ETA for a fix?

[yavor.rubenov]

Oh sorry about that - forgot to write back here. The fix is already in the public stable nightly builds (f.e here https://nightlies.chaos.com/main#/vr...e_6.2/20240920).

[kosso_olli]

Great, thank you!

[ChuckRT]

What worked for me was deactivate "Region Render" icon before saving

[kosso_olli]

Oh sorry about that - forgot to write back here. The fix is already in the public stable nightly builds (f.e here https://nightlies.chaos.com/main#/vr...e_6.2/20240920).

Is this going into a stable release of VRay 6?
And is this already included for VRay 7?

[yavor.rubenov]

This is already in the stable nightly V-Ray 6 release and is already in V-Ray 7.

[kosso_olli]

I will try build/32827.
The changelog lacks any information about this bug, but I hope it works.