I’ve noticed with this collection out of all the Halo games there seems to be some issue with Halo 3 that causes the game to appear overly bright to the point that color and detail is washed out. It’s especially noticable on maps like Epitaph and Sandbox.
In the original game there was a menu option that allowed you to adjust in-game brightness and I’m wondering if that is the culprit. It seems that while creating this unified UI they left out options that were game specific. Other issues caused by the UI prevents team switching in Halo 2 abd breaks Halo 3’s forge mode.
Hopefully these issues are in the pipeline to be fixed.