The problem only happens the first time the showroom is showed on singleplayer main menu, with a custom UI (Black Carbon UI), so, opening the game what I see is that: http://oi57.tinypic.com/2645rep.jpg If I go to vehicles -> showroom or press enter key to go fullscreen showroom, then it gets fixed: http://oi58.tinypic.com/oswvud.jpg And if I come back it is fixed until I close and open the game again: http://oi59.tinypic.com/16bhbme.jpg This is rFactor2 related, not UI. When happens? - Always. - On Build 770 and Build 660 atleast, cant remember if this is older.
You say its not UI related but specifically mention the Carbon UI. Have you tried other UI's or default? Also have you tried other garages? there are a few of them and some (or 1) seems to have had issues.
Carbon UI is the only one with Showroom on mainscreen, if you go to showroom button it gets fixed ... like other UIs. Yes, tried other garages, (3rd party). It happens even on screenshot showroom.
Kart UI is Official ISI UI, and it have showroom in mainscreen too, the same happens, first time showroom is too bright. First: http://i.imgur.com/eF0nJvw.jpg (game just start) After: http://i.imgur.com/3z7Aa6Q.jpg (went to showroom and then went back) Still happens on B798, please, ISI, can you solve this?