How can I achieve this type of fog in Blender

[I_suck_Clarke]

I am making a Blender game so no composting for me.

Yeah I suck at making a foggy scene so how do I make one?

How can I render a foggy scene like that? Either with BI or Game Engine or Cycles for still shots.

[Cronk (Roman Volodin)]

Properties panel -> World tab -> Mist