Sorry if this was addressed in another post already, i browsed the forums a little today but didn't see it.
Ditch the fog. 100% on every map. Get rid of it. It just makes things hard to see and annoying, and part of the beauty of 1.6 is how clear everything really is. There is no such thing as "hiding" in plain t in 1.6. Unless you count that 1 hill on cpl_fire that everyone climbs up and hides on.
But seriously. Aztec would be 100x better with 0 fog. And if there is any lingering fog on any other maps just get rid of it! Fog is one of the dumbest changes that valve made to source in the first place.