Using the Rain FX preview builds (Patreon-exclusive CSP versions), you can have traffic react to wet roads. The AI will drive slower, leave larger gaps, and occasionally spin out. This is the pinnacle of AC realism.
When it works, it is mesmerizing. The traffic doesn't just drive; it makes mistakes. A rogue AI might brake too late for an exit. A cluster of cars will form a "rolling roadblock" for no reason other than the chaos of algorithms. assetto corsa traffic mod
A CSP feature that spawns these AI cars dynamically around the player and despawns them once they are out of range, creating the illusion of a populated world without taxing CPU resources with hundreds of distant cars. Limitation: Using the Rain FX preview builds (Patreon-exclusive CSP