Visual Effects Photoshop Exercise

This was my first exercise that uses a mask.  This was done in Photoshop with multiple layers.  The cityscape image is relatively unchanged (other than some rather unsuccessful color correction) and on its own layer.  Godzilla was masked and re-sized.  At first I just masked all of the Godzilla image except for the toy itself and attempted to cut the cityscape in order to slide Godzilla between the slices.  After a while I realized it was much easier (and looked better) to leave the cityscape alone, re-size & place Godzilla and finally extended the mask to where the buildings underneath were exposed.