HaloMods "Classic" Read-only Archive

How do I enable fog? I made a box where the fog was supposed to be, linked it to the frame, made a new material called fog$, applied to the fog box, named the fog box fog$ exported and when I tried to compile...
It said i need a shader with fog. I really need to know, I think I did everything properly.

Fog as in water fog or ground fog?

If it's water fog then you add that as a cluster in Sapien.

Ground fog.