The last one is the first one i did but then i read the assignment again and it said 3+ concepts of the same scene and it had to have complex architecture so i did the other 3, it served as exercise anyway and it gave me some ideas.
Had fun and using 3d is so useful, in the third one i wanted to keep a painterly style and yeah it's more of an illustration than an environment concept but i'm kinda happy with it :D