We
want our room to have 4 walls and we can create
these without going through the same procedures
again.
Select your wall by pressing SHIFT+click, if your
wall has a red outline then it's already selected.
Once
you've selected the wall press the space bar, see
how it's created an exact copy of the first brush :)
Move the new wall down as shown here

Repeat
the last move by pressing the space bar to create
another wall but this time we'll be rotating the
wall.
To do this make sure the new wall is selected and
then press this button to rotate the wall

Pretty
cool huh, move this select brush so it lines up like
so

you
may need to extend the wall slightly, we can do this
by holding the left mouse button and dragging
outside of the selected brush, if you have the mouse
pointer inside the brush it will just move it about.
Also, to un-select a brush just press esc.
Repeat
this to create the other wall and once we've done
this you know have 4 walls in your first room :)
Next
->