nice render, but your door dimensions are off.
interior doors are typically 0.9 x 2.1m
youve drawn them at what? 1.1 x 2.1m? cant figure out the heights cus theres no context, so i guess the height doesnt matter, just the proportions.
anyway, doors look a little wide and unnatural.
also, there are no door frames, unless youve conveniently built and painted them into the wall?
the little squares you drew on there actually have structural significance, with set dimensions, the bottom bar should be the thickest with the other ones being smaller, which you have backwards, the bottom bar is the smallest and the centre one is the thickest.
and are usually only applicable to exterior or double doors.
doors should be reccessed into the walls a little bit more, the added shadows created would make it a little more dramatic aswell.
and skirtings along the floor and ceiling? not really necesary, seeing as its 3D and build quality is irrelevant, makes it a little more real though