its interesting but it really lacks a focal point. and the lighting seems off as well. the effect on top looks a little weird same with the text. however, i like the concept alot.
It seems to simple in my opinion. 1.) You should add more color to it and some lighting closer to the top. 2.) The renders/stock should be more visible and be the focal point of the signature. 3.) The text could be worked on. Other than my concerns, it is a really good concept like RedNara said.