Ah, didn't see that sidequest yet. You mean Cambyse (Choras) rather than Antaeus (Porre), right? We're definitely keeping Cambyse on the ship (nice map, by the way).
Anyway, it's impossible to move the Lucca/Robo stuff and still use the existing Reptite 2302 AD overworld, because the solution for 1 AD requires a free overworld for the additional Human 1 AD. However, the Reptite 2302 overworld was created by Nightmare975 basically from scratch, so we should definitely keep it...Nightmare, sorry about thinking of removing it! At first I thought it was created from a simple palette swap of the ruined 2300 AD from CT, but you actually re-created all the continents tile by tile, right?
So I guess what's best is to keep the Reptite 2302 overworld, and keep the 1 AD overworld, keep it snowy and used for both Reptite and Human chapters. Basically I'll revert the overworld palette changes of the previous post. The 1 AD locations can still have a custom palette if people agree on the one in the screenshot below (currently a Photoshop edit).
In the end, all this was just an attempt at tweaking things so that players don't get confused when they see a snowy world right after King Zeal literally burns the atmosphere and prevents the Ice Age, but I guess we'll go with the "It's winter" explanation...
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