I don't understand where all the values stand for.
#--Fog settings--
#Graphics.Renderer.SetYon float yon
#Visibility distance
Graphics.Renderer.SetYon 100000
#Graphics.Renderer.Fog.SetDefLinear float start, float end, float density
#Fog depth
Graphics.Renderer.Fog.SetDefLinear 1 1000 1
#Graphics.Renderer.Fog.SetDefExp2 float end, float density
#Graphics.Renderer.Fog.SetDefExp2 100000 20
#Graphics.Renderer.Fog.SetDefColor float r, float g, float b
Graphics.Renderer.Fog.SetDefColor 0 0 0
#Graphics.Renderer.SetClearColor float r, float g, float b
Graphics.Renderer.SetClearColor 0 0 0
Regards,
Frits