Great to see this stuff rolling in! Very exciting stage for this project.
I like Daeda's rough layout a lot, and personally don't have anything better to offer. I'd suggest pushing the size of the windows up a bit, make them as big as possible without disrupting the overall balance. The vines are a great unifying element, and will look amazing done up in full double helix Caapi glory, along with foliage etc... Maybe a couple tree frogs thrown in? Major lush jungle vibe with cosmic background... You can't go wrong.
As far as the background patterns go, one way of making them work consistently throughout would be to get the basic layout sized and nailed down, add the patterns into the windows as colorless overlays, then post the overlays individually so that the participating artists will have them to work with... That way we could get the density, thickness etc consistent across the board. If we each build our patterns from scratch we'll have a lot of different finishes.
I'm in the basement of my brother in law's place till Tuesday, no scanner or computer and a painfully slow connection (click a link, go make a sandwich, come back to see if it's loaded yet). So I may be limited in my ability to participate till I get back. But some sketches are happening in the meantime. Soon as I get back my next step will be to print and retrace Daeda's drawing, tweak it a bit, unless that's already happened by then.