System Information
Operating system: Win 10
Graphics card: Geforce RTX 2070
Blender Version
blender-2.93.0-4a784f32fe1e-windows64 02/16/2021
Short description of error
Open the attached test1.blend file.
Do a render
On the color management tab, if the look is set to none, you can change the gamma, exposure, and color-correct the image using curves
If the look isn't set to none, (very low contrats to very high contrats) the gamma, exposure and curves dosen't have any effect
Thank you for the report. I can reproduce using your file and build 4a784f32fe1e from the build bot, but only when the look is set to Medium Contrast. When I switch to other looks, everything works as expected.
There was an issue with Medium Contrast, see T85671: OCIO crash/abort using Filmic Medium Contrast.
rBc9c4802c1c26: Fix T85671: color management crash with Medium Contrast look should fix it, but won't be on the buildbot daily download page until tomorrow.
Please test again tomorrow when the build is updated and let us know if it fixes the issue.