Thanks for your response I'd definitely be interested in such a mod, & willing to help how I can. Unfortunately in my attempt I had similar problems to you (XML, some Python, experience with a lot of random Events, but no graphics skill to speak of..) I'll attach the XML from my unsuccessful attempt at using FF space terrain in Civ4; maybe changing the TextureBlend fields could help? I have no clue how to deactivate the waves etc. Hopefully by posting requests in a Civ4 graphics forum, we could enlist help of an artist to skin a nice-looking space terrain. Other than the space terrain issue, as you said plenty of great unit/terrain/resource graphics are already available (eg Dune Wars, Planetfall, Mars Now) so a reasonable reskin shouldn't be too hard.
Thinking about the background premise; tried to come up with an intro screen blurb for how several earth nations would simultaneously get access to a set of several nearby habitable planets with humanoid aliens:
So the "Sail to Europe" deep-ocean terrain already appears close to most continents (planets) and could simply be named The Anomaly (or Wormhole, Rift, etc), which would make sense as a cool way to travel to/from the various planets. Later in development, events could make the Anomaly unstable for several turns, temporarily preventing travel to/from Earth or occasionally cause a ship to exit near a different planet than expected.
Some ideas for replacement resource/citizen types:
Spoiler:
Spoiler:
Some ideas for replacement resource/citizen types:
Spoiler:
Comment