So another tutorial from me.
ive made a small room for this but that doesnt matter. (dont ask me for it deleted it xD)
the red circle shows you where you can find it.
so first select the brush you want to clip:
then click on the clipper tool button and click in a 2D window and click on the
first point of your cut. then do the second one and it should look like that:
with ctrl+enter you can choose the side of your cut you want to have a the new brush.
press enter if youve finished your clip and want to go on with mapping.
with clipper tool you can choose 3 points of the cut. ill sow you that
in another picture.
it will take some time to get used to it. i hope this helps
you.
thx Para