This piece was a big challenge for me, because I worked with architecture and difficult perspective for the first time, which means I had to plan the whole composition from the beginning, which I normally don't do. Just the process of getting the perspective right and the elements in place took the time I normally use to finish a piece. There was also a lot of texture work involved. Although it's still far from perfect, I learned a ton about perspective, which is great.
Credits for textures:
Done for a contest on deviantART