
Its not too bad really, I think the lighting in the top right corner is a bit too strong. However you nailed it with the blue lighting, the depth is getting there as well. I'm not sure though if that front c4d fits with the render, maybe try using a similar one as the one you have in the background. C4d's are tedious bloody things, and take a bit of getting used too, but you seem to be picking it up faster than I did
Also forgot to say, try darkening the edges a bit use a large soft brush about 250-300px at about 60-70% opacity. Then brush around the edges, then lower the layers opacity too about 75%