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[Lyraina]

If you are insecure concerning architecture, I'd suggest doing this the hard way and start out with a line drawing... establish all the perspective you need, and draw all those buildings as detailed as you need to get a clear vision of what you want. You could also step back even further and start with some rough and small thumbnails to make sure you are working on the strongest concept/composition of all you can think of.
So far I like the subdued mood of it and the wet ground, but can't really tell a lot of what is going on otherwise.