Well the monochromeness of the sig makes it hard to make out many aspects of the sig It is almost never a good idea to make a monochrome sig and I would say that rule applies here. Other than that the text is hard to see as you have stuffed it in that dark corner. A personal rule I like go by for text color is that I try to use opposing colors for instance if your sig is mostly blue try a green,yellow or red text depending on the elements in your sig. This will help your text stand out and add some contrast to your sig =D I think you have blended the render well and I think the lighting is pretty good too. It is hard to tell with all that blue
