in order to get the sig to actually popout, you have to make sure you have a transparent background and save it as a .png eg.
I haven't seen a pop out signature in a while. Well I don't like pop outs.(anymore at least) In todays style it's all about blending. It lacks:Blending,any effects,Readable text . Looks like you:brush some blue shaded grunge brushes on it. and some text that color is really close to the bg. opened a new canvas and pasted it. then add a render. As said before text is unreadable.Also way to big. No lighting. Most of the key components to a signature these days is :Lighting blending effects. Which are nearly impossible with a pop-out signature!