Geoscape Fog of War

[mercy]

At creation of beginning base the radar range clears fog of war around the area. All other areas of Earth are covered with thick clouds + semi-transparent darkness indicating XCOM knows NOTHING what transpires there.

Patrolling craft clears fog of war temporarily as long as lingering in remote areas.

[Align]

Seeing radar ranges fills basically the same gameplay function, mind.

[moriarty]

turning this into a FOW graphically is something that might be considered if we ever turn the geoscape into a true 3D-rendered or openGL globe, though... for now, it is impossible (and probably not necessary, like Align said )

[Yankes]

I once create something like that when I try do radars ranges but its was all scraped because Volutar solution for radars was faster and look better.
https://openxcom.org/forum/index.php/topic,322.msg4756.html#msg4756

[Mr. Quiet]

Make it a darkish scary cloudy FOW and I'll take it 

[mercy]

Imagine the foreboding, dark world of Twilight Zone. Alien incursion increased generation of storm clouds, which acquired a dim, murky color tone toward black.  There is still plenty of sunlight, only a lot more foreboding storms.

Earth from above looks like a ghastly Fog of War. However where the light of XCOM penetrates  - successful missions - the clouds seem to clear and the lands enjoy the sunshine.  Where XCOM loses a base, Twilight Clouds reappear.

Also UFO-s are mostly seen coming out of the darkest clouds what often looks like a nasty hurricane with plenty of lightning storms in the center, A'la Final Countdown.