Oooh, I love these effects that you've used and the colouring you've used fits in well with the entire image. You have also used lovely placement and lighting as well is good. I do feel that the background feels a bit empty, like the render could fill a bit more of the signature or you could put in some text. Otherwise you could put some subtle renders in that add to the flow of the piece or experiment with a few effects. It's a great piece overall so keep it up : D
Oh wow I found the thread with your sig. When I first saw it as your signature it was like whoa I love the placing of the light. It makes it look as if she's illuminating the darkness around her. Wow very good placing and shiet this is just sexy. That's what it is. Simple and clean. Not too much. Well, I guess it is too much, but then again it's not, right? If you ever have time in your hands or you're bored, would you be kind enough to make this poor rat a sig porfavor?
Oh wow this is lovely, I do agree with Ienzo in that the only really nit pick is the lack of stuff in the back ground, I'm not even honestly sure what would be good to include, but maybe play with effects and brush strokes to fill the void. other than that top work.
I really like how this came out. c: I just wish the render towards the bottom of the signature was more.. smooth looking? It looks really pixelated to me, I don't know if it's maybe just my computer. But the illumination is really great, and I actually really like the background. The simplicity of it makes it more attracting to the center, in my opinion. So, if you could, just try to clean up the pixels at the bottom, and I'd totally love it. c: Great job~