This is my latest work made in Blender, Render with Cycles 3840×2160 at 1000 samples, render time 7 Hours.
Everything is great, but the view outside the window really looks like you put a photo there, the perspective seems a bit of. The rest is awesome 
Thanks for your suggestion
The brick wall could be a high poly. It looks very flat even with the bump map. The ventilation pipes could use higher res bumpmap and also to be smoother.
Other than that, it looks great. Especially the carpet and sofa.
I’m agree with you for the brick texture and material, i’m changing it. For the air duct for me it’s enough a little bit of glossy.
I mean keep the glossy but the texture of the bump is low resolution. You can see the texture of the bump. By smoother I meant maybe more reflection with a higher resolution texture.
Now I get it, I’ll try thank you!