Two things: try to make your signatures a bit longer than tall, this helps with flow (unless you are doing a vert.) and look up some tutorials on planet renders forums, deviant art, and some GFX forums. Don't start using C4Ds now, the effects in a signature usually come last. you have to take into account the lighting, depth, flow, focal, blending and composition before you tackle things like C4Ds or fractals. CnC for the tag: The render needs more blending into the background, it's mostly different shades of green all over, try some other colours that might work. . .red, perhaps? I cant read the text at all, it needs to be a relatively simple font, and contrasting with the background. The lighting is ok, it goes from light to dark correspondingly on both foreground and background, but it needs a stronger light source.