Yes. You didn't draw shadows from frames near portal. I mean those ) shaped things. Also you don't concider light from a portal on opposite wall on bars. Left portal's position is a bit higher and overall perspective is skewed a bit.
Well, I won't change that one. I wanted to create some sort of ambiance using those color masses to make some sort of halo arround the Portal. Technically it's not supposed to be that way, but I like the result better since those colors pop-up more.