Reflex PE introduces volumetric clouds and atmospheric fog. Instead of a flat white layer in the sky, clouds have volume and shape. Fog rolls in during rain or near bedrock levels, obscuring vision and adding a sense of mystery to the world.
In simple terms, is a modified version of the standard Assetto Corsa Custom Shaders Patch. It replaces the game's default lighting and reflection logic with dynamic, ray-tracing-like approximations. While the standard CSP makes the game look "better," Reflex PE makes the game look "alive."