Can anyone help me with this? Im trying to create an earth map with different ocean levels. For example you pick from -100 feet of ocean or -200 feet of ocean. As the player picks a lower ocean level map more of the sea floor is exposed with less water. All that i need right now is a Physical map of earth with ocean depths and a key.

If your interested help out thanks

Interesting idea! But I'm afraid I haven't a clue how to make it happen.