Far Out

Was trying for realism in this piece. At least, more so than usual. I also wanted to try out the 3D tools Photoshop has. I think I did an ok job, so I'm done for now (though if anyone sees anything that needs improvement I'll probably be willing to make changes).
Original size is 12000x6000px, making this the first image my desktop has had any slowdown with.

NOTE: This looks pretty bland on darker monitors (not that it is spectacular even on the monitor on which it was created, but trust me, it's better on a brighter monitor). I tried editing the jpg to make it look better on this monitor here at work but it didn't work very well My apologies to everyone who looked and was bored.

LIGHTER VERSION: [link] Should I just replace this with the lighter version?