https://dev.arma3.com/post/oprep-visual-upgrade
There are many reasons for the changes, but our main goal was to maintain a high quality of the whole game and being prepared for the release of Arma 3 Apex. The lush archipelago of Tanoa would stand out compared to the relatively muted landscape of The Republic of Altis & Stratis, and even assets that were great on older islands would not fit in. We didn’t want any artificial coloration of scenes for story purposes alone; rather, we decided to bring the whole game closer to real life.
