That's pretty bad rendering there.

Source of light and shadows don't seem to match. Yea, I agree with you that your lighting sucks. Well, lighting isn't easy to master. I admit that my lighting sucks too..

Too much reflection (especially on 'wood' flooring). The sofa/chair legs.. are they supposed to be chrome or wood or what? I can't make it out. If you intend to be a Interior Designer, you might want to brush up a bit and check out the latest trends because your interior (and color combo) is hideous.

btw, why do you call it 'architectural' when there's really nothing related to architecture to be seen?