EXR region gamma mismatch in elements

[matthew_allen]

Can anyone tell me what's going on here?

32bit EXR rendered and then loaded back into VFB (Vray Next) to render a region. Works fine with RGB and light select, but render elements (lighting, GI, specular etc.) appear to show gamma correction - or rather lack of it. I guess that makes sense - the EXR is linear, but the region displays as gamma corrected.

My aim is a workflow whereby everything matches so I can directly save out the multilayer EXR or individual passes without any intervention in Photoshop.

[hermit.crab]

If you've saved the EXR linear, there shouldn't be any difference between the image and the region with whatever Display Correction you've set afterwards in the VFB (presumably sRGB in your case - double-check this). Also, if you're using 3ds Max 2024+, check the Color Management options (Rendering > Color Management) and make sure it's set to Gamma Workflow (since the ACES workflow was not yet introduced in V-Ray NEXT). If that doesn't help, do send the scene and the image that you're loading so that we can troubleshoot.

[matthew_allen]

No, 2020 so no colour management.

I'll do something else with a simpler scene and check for behaviour, as mentioned they're identical other than the render elements. I do have it set to save VFB corrections to the RAW (EXR) file, so maybe that's it, but it only seems to do it for RGB passes, not lighting e
elements.