I got sick of my old pixelated skybox powered by Google Images and decided to make a real one. I used Spacescape to generate a sufficiently trippy outer space skybox, chopped up some cloud photos in Gimp, fought with my code for a couple hours, and wha-la:

Scary Monsters

What's that glowy green thing you say? It's the new monster I just added, creatively named "the vine". See that string of dark blocks coming out of it? It snakes its way to you and basically tries to constrict you to death. Here's another screenshot of its handiwork after running for a minute or two.