[Dach]

dunno if you can pass arrays to the command, but try creating an array with the tiletypes;
array = {22,22,22,0,22,0};
or so (probably need to use a for loop) and pass it like so
setshape2 int(this.length/16),int(this.width/16),array;

works on showpoly, well I think it does... my script that uses that doesn't work for everyone for some reason...