Explore the wonderful world of masks. They can change that square into anything you want. :) Both Photoshop and Paint Shop Pro can handle quite complex masking technqiues...and you can get some extra special effects with them. Including fog or smoke if you apply the right kind of mask to a top layer and then adjust the transparency. :) I'm not familiar with Photoshop so I leave the field to someone who knows what they are talking about.