hi, first sorry for my english, but i hope you can now what i think. ok, i now the most members are great workers. but i found a little trick too build a room for using lightly. at first size the ground on, then build your rooms with the walls and windows you found on the freestuff area ore use the singel-platt on your propsflodder. make your room with out any texturs. at finish save your work as a obj-file. save it with out any doors if you want movabel doors. reloade the obj-file an use the hirachy-editor for making diffrent materialgroups (walls, windows, tops and downs) at finish this you can save your work as a prop and use your materialegroups with textures you like it. at this way you need not too mutch memory. so, i hope you can anderstand what i mean. ...leeroy5