I've set up a code for using ModTer bricks to make islands.
1. Start by building the base shape.
2. Add ramps, worry about the corners later. If you can't figure out where to place a ramp, proceed to Step 3.
3. Worry about the corners. If something dosen't seem right, go back to Step 2.
4 (optional). Add a hill or a mountain.
5. Add foliage.
6 (optional). Add buildings.