USAIR Raceway - Shaders Update

Brand new shaders for usair + vao and autumn skin, see the before and after at: https://acstuff.club/u/comparison/EHm

Download link:
https://drive.google.com/file/d/1EG8exJne_Ch6-ZG8mJ6YrQQB8HV8pmzI/view?usp=sharing