Matera, 38x56cm

Honestly, this is awesome. You'r technique is really impressive.
But, but... For me, there is a lack of perspective and details.
Details are crucial. You really need to add more of them. First of all, paint these blank spaces on right and left, they need to be painted. Secondly, don't only paint the center. Look, when its on the border, there is less less details, its blank or it just look like random colors. You need to get an homogenous picture, with details everywhere, and especially where we didn't expect to find them, like on the borders <img src="e.deviantart.net/emoticons/s/s…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="391" title=" (Smile)"/>
And for the perspective, I think i got this weird feeling because of blank spaces, its another reason to paint them. You can also accentuate the perspective, make it look more dramatic. Then, finally, details, with the right perspective, are pretty impressive and make a very good-looking picture, they make the perspective look deeper.

Hope it'll help <img src="e.deviantart.net/emoticons/s/s…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="391" title=" (Smile)"/>

PS : Sorry for my english, i'm french and still learning english <img src="e.deviantart.net/emoticons/s/s…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="391" title=" (Smile)"/>.