Here’s a quick look at the process of creating the floating interface. Forgive the blurry pics – my camera phone sucks.
Then I busted out my tiny light table. I think it only measures a little over a foot wide. It’s small, but perfect for small applications like this. I bought it at Hobby Lobby for 30 bucks or something?
Then it was added on a separate layer in Photoshop. Here it is over the finished colors. There are a few steps I skipped over – like coloring it and layer effects, but those are things that (if you were going to do this) you should experiment and play with on your own. I think I used ‘overlay’ and then adjusted the Hue/Saturation menu.