Here are some of the maps I made for an upcomming French RPG: Subabysse, a subaquatic post-apocalyptic setting, published by Ludopathes Editeurs.

This version is a poster mock-up of the worldmap.

Click image for larger version. 

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And these are samples of the maps in the book but that may be published as a map pack as well...

Click image for larger version. 

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If you want to have a closer look on them, feel free to visit my dA gallery here