Snowdrifts

[jp10]

I can tell you from personal experience that on cloudy days (no direct sun) snowdrifts can be practically invisible in real life. A white drift against a white background throws no shadow in that situation. Infantry will walk right into them and also step into snow filled depressions that looks like a flat white snow field. Tanks moving off road will plow into them and also sink while driving over frozen ponds. I find the game perfectly realistic in this regard.