I recently ran into a similar issue, and while I cannot guarantee my problem is the same is yours, I figured I’d throw it out there for you and other users who are googling this issue.
I have a couple of directional lights in my game that I’m using to fake a backlighting / GI effect on a few character models. I was using layer masks to ensure that the directional lights were only lighting the desired models, and not the rest of the world.
This worked as intended in editor builds / testing, but when I published the game to a standalone EXE, the entire world was much brighter. After some playing around, I discovered that the directional lights were ignoring their layer masks and illuminating the rest of the world. I’m not sure why this was only happening in the standalone build, but I assume it’s just some quirk in the compiler or something.
Thanks for your answer :) I just tried this but it didn't worked, when I was launching the game (the built one), te quality was set to fantastic. I also tried to put the editor in fastest mode, but the result was still very different from the built game...
– Georgena