FAQ - Fog
With an ATI graphics card you can play under fog conditions, see here. NVIDIA graphics cards do not display fog.
Install the game,then the Add-on version 18 June 2022, then click through the menu of the game:
Options - Graphics - Custom - Configure Custom - Fog
The Add-on is already included in the limited edition.
To play under fog conditions in the Demo version, install the Demo Add-on with the option "fog".
Fog looks best at Night.
Recommended fog settings (files Level_Data.txt): fog_start = -500; fog_end = 500;