These entries are superb.
@captain terror: Gorgeous lighting, the only thing I'd remotely think about changing is the floor brush to extend it to extend it as far as possible into the horizon; just for a semi-infinite look. But otherwise, this is my favourite use of a tron-like theme I've seen with limited brushes so far.
@quailcreek: Interesting generator, I like the use of brushes.
@zeeba: I like the architecture, I sense you've taken some inspiration from an entry to the mapcore compo, since the brushwork looks a little similar.