As a matter of fact, here's a visual idea I threw around a little bit that may help you guys understand the look of the island. It was, long ago, a community. There were plenty of large trees and greenery, as well as buildings and houses. However, the nuclear explosion came and destroyed much of that. The trees were reduced to ash, as well as many houses. Some buildings still linger, with much rubble and broken bits of houses, but some frameworks and more durable buildings are still around. After years of neglect, vines and plants have begun to grow on top of these buildings, and the plantlife is much unlike anything seen in the real world. The plants are huge scale, thriving on the lack of humans and deforestation. Only strange kinds of "greenery" survive, adapted to survive on radiation (wild colors, not just green plants). In other words, crazy, crazy plants grow here! If anyone's seen "Nausicaa, of the Valley of the Wind", think of that kind of world. If not, watch the backgrounds in this preview for it, especially the beginning. This will not be quite as extreme, but that's the kind of idea.