well everything besides the 3d in that picture can be done soley in photoshop. the lighting can be easily manipulated by multiplying the layers and changing the layer modes... the shadows were most likely done with the drop shadow in the layer effects.. and all of the "mesh" appearence was just done once again by a ton of layers with diff. layer modes. that picture is nothing compared to what the guy at
www.chapter3.net can do. check out his work, heres a piece:
even though a lot of his work has 3d, theres a ton of photoshop involved.