Could you also please explain the mud/snow options in atmosphere?
How can I change the hight of the mud I draw.
The depth of the Snow/Mud is adjusted (painted) in the HEIGHT/TERRAIN tool.
On the toolbar you have two dropdown lists:
LMB (Left Mouse Button)
RMB (Right Mouse Button)
1) Set the LMB to SET VALUE.
2) In the HEIGHT textbox enter a value of height (use .23).
3) Click on the option button EDIT TOP LAYER (ie snow).
4) Paint where you want the deepest snow on your terrain with the LMB.
5) Smooth the snow edges with the RMB.
You never want to paint snow above .24 height. That is considered DEEP SNOW and will slow units moving thru it. In the overlay menu you can switch your view to VIEW DEEP SNOW and deep snow areas are painted RED so you can find them easily.
You can adjust the textures used for the snow in the TERRAIN menu.
Just remember that a lot of snow will make your map run slow in the game (Kills FPS). The size of the map matters. So 1v1 are not too badly affected. But a full snow 4v4 may have terrible FPS late game.
EDIT: Check these links out.
How To Frost
How To Tactical Snow
Why do snow maps kill FPS