Palace Interior

I built thi s interior in Sketch Up now I'm going to hand draw and fix it up a bit and detail it out using my light table and tracing paper. I'm sick of photoshop - I don't know how to use it. I want to see what I can come up with using Piranesi as an influence. It will end up being the Palace that my character Gaspar stays at when he gets to Sarbug in the Hymn of the Pearl