>>712842952
>>712843194
>what's the real reason they do this?
I could be completely talking out of my ass, but it looks like some kind of atmospheric filtering effect? In real life things in the distance have a more muted color, less contrast and get tinted with ambient background lighting color (e.g. sky color) due to how light bouncing from distant objects has to travel a longer distance through atmosphere to get to the viewer. Though many of those images look like the effect is on overdrive, resulting in a foggy look.