Here are the links to larger versions of the Island preview images:

Top down:
https://www.dropbox.com/s/axd49yoy2qa4e0e/Island%20top%20down%201.jpg?dl=0

Isometric:

https://www.dropbox.com/s/mjmwiti2c6y8npj/Island%20Vue%20isometric%201.jpg?dl=0