You will notice once you build them . Well, they do look different somewhat, at least because they got to have those domes so that they don't get washed away .
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Solver, WePlayCiv Co-Administrator
Contact: solver-at-weplayciv-dot-com I can kill you whenever I please... but not today. - The Cigarette Smoking Man
Sea Cities do and are supposed to look different, its just a bug and its being worked on in the creation forum.
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Call to Power 2: Apolyton Edition - download the latest version (7th June 2010)
CtP2 AE Wiki & Modding Reference One way to compile the CtP2 Source Code.
I am working in a fix. But the best fix has a side effect. The Undersae tunnel on beachs and trenchs dont give movement bonus (1/10 of mov). Land units still walk over them but costing a whole move point. If you think it is worth to have this side effext, check the fix out here
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