I think I missed the part when the portfolio section turned into a guessing game.
Anyways signature is good, the left side is a bit empty.
With the smudging on the right side of the canvas, it leaves it unbalanced since it is overpowering the balance of this piece.
I like the way the lighting is done, where ever there is brighter smudging there is a light source that appears on the render from that angle.
The lighting could have failed that way, but it turned out to be amazing. I would say the best part of this piece are the light sources.
@Secured, every piece does not necessarily only need one source of light, in this case I see 2 and it works out just fine