Hub Prime - stages 1 & 2

Stage 1

Apologies for posting very little recently but at the request of the people who commissioned it I have been unable to show the progress through "Dark Citadel", a large painting for IX in the USA which has taken nigh on a month to complete. I will be able to show it it ten days time or so when they have used it for early publicity for the IX event in Reading PA in October.
I was expecting to have a bit of a rest after the large painting but an idea for a Science Fiction-style picture popped up into my head whilst in the bath a couple of days ago and felt duty bound to get going on it. It was vaguely connected to the sky in the previous commission but over this morning's coffee I decided to change it a bit but this won't be apparent until later in the painting progress.
Four kind of monorails converge on a cavelike entrance under a city built on rocks that straddle a canyon on a planet like ours but that has two moons in the night sky. 
Stage 1 was "drawn" up with a small bristle brush using a mix of Burnt Sienna and Winsor Violet thinned with Liquin.
Stage 2 has been put in with a flat brush and a rag using the same paint mixture with a bit more Liquin added.

Stage 2