If you have a modern PC (GTX 1070 or better), switch to Pure. If you are on a laptop from 2015, stick to Sol for frames.
is a comprehensive weather and graphics modification for Assetto Corsa pure skybox assetto corsa
: Replaces original clouds with massive, high-resolution textures that look particularly stunning during sunset and sunrise. If you have a modern PC (GTX 1070 or better), switch to Pure