public void pruneWorld() {
		for(HexImage c : hexList.values()) {
			if(c.cX + RADIUS > right + RADIUS * 2 || 
					c.cX - RADIUS < left - RADIUS * 2||
					c.cY - RADIUS < top - RADIUS * 2||
					c.cY + RADIUS > bottom + RADIUS * 2){
				big.getChildren().remove(c.hex);
			} else {
				if (!big.getChildren().contains(c.hex)) {
					big.getChildren().add(c.hex);
				}
			}
		}
	}