yes one opening as shown. re hallu tiles: could you not make a 1 tile wide corridor to shoot down? would this not also make it impossible to warp into the hallutron as the corridor is to small for ships? in fact a corridor is more fun anyway because you can bounce bullets down there. Ofcourse, forgot about that. EDIT: oops also forgot about flags being able to spawn there, makes it impossible to have it opened there then... Here's a first impression (still needs to be tiled, changed a bit, etc): http://img338.imageshack.us/img338/491/cptdesign.jpg