Depth was added to the piece in Adobe Photoshop using multiple highlights and shadows for each layer. Once I was satisfied with how the piece looked, I merged the layers together that would not need interactivity once in Adobe Aero. For instance, the moth itself started as 10+ layers in Illustrator and was compressed into 1 before export for Aero. I wasn't going to need to differentiate between those layers after the depth was done in Photoshop, so I saved myself some time (and sanity) before exporting. You can save multiple copies of your PSD file (original and merged) if it will make you feel better...I did. Am I insane? Maybe. But if taking up space on my hard drive is going to make me sleep better at night, I'm here for it.