try to stay away from framing, it limits your piece and cuts off canvas. 2 - need to map your focal to blend it better & lighting is off. 3 - eh no comment. 4- nice but needs better lighting.
Ehhh, some of these really need work. 2 especially, you can totally tell it is a render because You can see where it cuts off. The others are alright but no where bear your best.