Wonderfully real
This is a fantastic still-life of a complicated-looking but geometrically straightforward object. You put a lot of effort into this, and it shows, and at anything but the maximum resolution, there are no clues that this isn't a photograph for an advertisement.
The only give-away is that the reflections of the knobs in the main plate are too perfect, but this is a ubiquitous problem for all 3D software: if you find a work-around to too-perfect reflections, ... tell me! :-) Great stuff!