Thread:Vorknkx/@comment-3547390-20120323184142/@comment-1496755-20120402145353

Ice can be even better when combined with some fire.

Heretic's E2M4 comes to mind - you start in an icy area, then you infiltrate a fortress surrounded by a moat of lava. And there are some lava pits within the fort itself.

The first half of the level feels cold, and the second - warm. A really nice effect.