Iterator<RegionInfo> regionIterator = access.getRegions().iterator();
// relight each region
while(regionIterator.hasNext())
{
RegionInfo current = regionIterator.next();
Coordinate2D coord = current.getRegionCoordinate();
log("Re-Lighting " + current.getFile().getAbsolutePath());
int x0 = coord.x << 5;
int z0 = coord.z << 5;
// relight each chunk in batches