1-,2-, and 3-tiled (what I like to call "courtyard") windows - lights up your fully-enclosed inner courtyards just like the sun does. The plate glass 1-tile's for our lovely downloaders - the 3-tile's because it matches the 1-tile, and if anyone wants to use it as a base instead of going the code way, they can just z-buffer away any unused space beacuse the hole will be plenty large (as if I know anything about window-holes), and the 2-tile's just the only one I know of. Have fun.