Immersion in a racing simulation depends heavily on the atmosphere. The original game featured rigid, static skyboxes and basic rain effects. Environmental mods change how you experience the race weekend. HD Skyboxes
While primarily a content mod, it brings modernized car models and improved skins. race 07 graphics mod
Which are you trying to upgrade first?
Look for "Race 07 Natural ReShade 5.0." Avoid the "Hyper-Realistic" presets that add too much bloom (they make night racing impossible). Immersion in a racing simulation depends heavily on