Mandrake: Thank you. Looks like a better version of that red sky will feature in a proper render. You've probably noticed that reflections do not match the sky. That's because I'm using another image for reflections and refraction and it doesn't seem worth changing the setup for preview renders.

contrafibbularities: The edge to spline is very useful - when selected (in point mode) the new spline should have a smooth colour graduation. If it doesn't a quick optimise usually sorts things out.

The window area rough object is my main part for the command module :-) Without the overall dimensions being accurate then the whole command module will fail. Those added curves are easier to do than explain but hopefully over the weekend I will be able to do a 'brief' description of the process - it's a bit more involved than using a hypernurbed plane (for instance) but I found trying this has given me more accuracy with points where I wish them to be rather than hypernurbs running the show.