From Carmageddon Wiki
The player can change the following options:
- Car shadows: Enables/disables the shadows that appear under the cars.
- Land shadows: Enables/disables other types of shadow.
- Detail: Unknown. [confirmation needed]
- Draw distance: The higher this is, the more things are drawn at once on-screen. If this has a rather low value, the player can see the scenery cut-off relatively early.