Your doorway is way too low. See how many whine glasses high it is you'll get my point. :) Another point of critique is that imho the scene is over lit. Go for more darker area's, kill the omni try using area lights or spot lights. Last eye catching thing is that your wood textures are too clean. Try to give them a more 'used' look. Not bad, but can use some more tweaking. :)

OMG! you're right! Regarding the glass you've centered the point: i'll reduce its size regarding the illumination i had to raise the original darker shade to better show the floor (because the picture is an ambient fot the floor), originally i've used area for GI and spot for the burned effect on the corners, but, by doing so, the light was more natural, but the floor was underexposed... A question, how do you suggest to add some dirt to the barrels? have i to add them in PS before applying them or with a diffusion map in C4d? again thanks for critics!