Wdll, I have similar problem and not just with SP, I find playing with the brightness level on the screen helps. I also find killing great swaths of enemy armour helps as well on those vast open steppes or farmer's fields.
Cheers
__________________ Eternal War(gaming) PanzerBob
"Whenever in future wars the battle is fought, panzer troops will play the decisive role..."
Heinz Guderian, General der Panzertruppe