How can you disable vignette effect in vanilla minecraft?

this is using proformance mod "Embeddium" and also on optimization mod "OptiFine" it has a setting to disable Vignette

At moment I do not see a way to fix it. I have tried everything. Just keep the vignette enabled for the moment. I have contacted the authors of Embeddium, not sure if they have an idea.

Took me quite some time to figure out, but I have figured out why the issue occurs. It is fixed in the newest version. Thanks for taking the time to report this issue.! Your hint about the vignette brought me on the right track.

yippee thank you for fixing this :D