Exposure all over the place

[Kim Laughton]

This is a temperamental problem - most of the time everything is fine, but it occasionally comes up on a project.

I always use the physical camera with exposure gain set to manual. I don't modify exposure settings in environment and effects. Sometimes the render in the frame buffer can jump to a darker or brighter setting - sometimes after it has completed, and sometimes when I'm re rendering a small area of the image. You can see the issue in the attached, when re-rendering the center region the rest of the image switched to a lower exposure.

[Alex_M]

Are you using the lens effects in Vray by any chance?

[Kim Laughton]

Are you using the lens effects in Vray by any chance?

Yes - glare is on, think that could be a factor? If so perhaps the new implementation will solve the issue?

[Vizioen]

I had a similar case yesterday, the glare caused my image to be completely darkened after reloading an older render in the VFB.

[Alex_M]

Yes, this problem comes from the use of lens effects. It's supposed to be fixed in Vray 3.5 Beta 2.

[Kim Laughton]

Ah - good news then! I'm in the middle of rendering an animation so haven't been able to upgrade to the newer versions yet, still on 3.4.