Thanks I appreciate the help. I tried 0 and no change from what I see.
By green vs yellow I mean this: Play Wembley or any EPL/MLS stadiums at 12:30 pm and the pitch is rich green, and all the colors in the stadium are bright and alive. Play Azteca and other South American stadiums at 12:30 pm and all the colors in the stadium are yellow and washed out and dead, as if EA used a yellow filter to emulate "stadium in hot, scorching, soul-killing weather zone."
Yeah I know what you mean.
Unfortunately, after all the (dozens) tests I had to do to make these turfs I found out that the rich-green colors you mention are connected directly with the stadium lighting. Which we cannot modify or change since we cannot edit the 3D models.
The force_regionalization line can only do so much. But it won't change the stadium lighting.
I hate it because I also want to have all the stadiums to look like the one you mention. But unless I've missed something, it's not possible at the moment.
I would love to be proven wrong though!