Well, here is my second Deathnote sig, I hope you like it! ...there are actually 3 renders in it -.- All criticism/comments/suggestions are welcome!
its a render of light with a render in the background which i made black and lighter shades with a small render-like thing over the apple with an effect "tiled reflections", all of which i had to smooth over and position.. so about 5.0/10.0 work ethic.
You should try using a more orthodox signature size to make it look even better. Other than that, you are going crazy with Paint.NET Keep it up!