The rotation on the seat and footstool legs was my best clue too.
Probably because I have played around with those programs and you know how such a image will be built-up. (Meaning that you look at parts which have been copied and moved, like those legs)
Also the paintings look like they are glued to the wall, instead of hanging from a nail or something.
But other than that the render looks really good. (The overexposure is also something that only people that have worked with these software packages would notice. And it is a cloudy day, so there shouldn't be too much overexposure anyway).
But had I not been asked to judge if it was real or not, I would probably mistake it for a real photo. (I like the subtle differences in the reflections on the different materials)
I suspect that the car is a composition of real pictures modified with photoshop.
And the Matrix look-a-like is probably rendered. But it is a lot easier to render that one. I have seen tons of renders looking just as good as that one, because they usually take photorealistic textures wrapped around a mesh. If your mesh is good enough, it is then easy to make a photorealistic render.
The room is much more difficult to produce, because the realisme has to be created with excellen lighting and reflections, which are not "faked" with textures.
), but the scene still looks to me as sort of overpolished, what one comes to expect from renders.
