THE POS CRATER MOD
Some craters in CM are 'unreal' craters and give no cover in CM even though they look exactly like real craters.
So you have to tell which is which by selecting a unit, hit 'L' and cursor over the crater. if it reads 'crater', its real.
Alternatively use my stunning Crater Mod as in these pics, to tell at a glance which are real and which are unreal.
(Incidentally real craters give exactly the same cover as foxholes)
PIC 1 (unmodded) -
The squad wants to run into a crater but he doesn't know which are the real ones..
PIC 2 (modded) -
With my mod the 'unreal' craters are just flat brown circles with no hole in the middle, and the squad knows they'll provide no cover at all, so he knows he'll have to run for the real ones with the hole in the middle.
(incidentally you can also drive AFV's over the unreals, knowing they won't slow or bog you)
(contact me and i'll send the mod, it works for cmbb and cmak)