My entry, with ****ed up borders. Ah well. Better than nothing, I suppose. Had the cut the render, and make a part of the skull myself since it had fallen off on the render.
EDIT: Attempted to fix the disappearing borders a bit, haven't been able to do much, can't be arsed to do anymore because I would probably have to remake the signature then. See it as a Proof of Concept.
EDIT2: Made some modifications, and interesting how the very light blue-ish hue of the forums background can change the complete look of the signature because of the transparency.