Heaven And Hell
Graphic designers are now able to produce good cloud coverage. To the layman, the sky looks natural and real. The clouds move, hide the sun or the moon, and in the event of a storm, even scurry across the sky.
The representation of hell, on the other hand, causes considerable problems for games designers. Lava, plumes of hot air, wafting fumes, raging dust clouds, and firestorms simply overtax the typical PC. Compared to the special effects Hollywood comes up with, even the most up-to-date games look fairly archaic.