C'mon, I tried crashing into the earth and didn't burn up in the atmosphere. This is a terrible simulation! </sarcasm> (Super cool! But I wanted to ask how you

C'mon, I tried crashing into the earth and didn't burn up in the atmosphere. This is a terrible simulation! </sarcasm> (Super cool! But I wanted to ask how you were rendering the background. The earth, when you get up close to it, has this really interesting noise pattern. What is causing that in the rendering? I'm using Chrome on OS X.)