Clipping a brush against a plane is a great way to get it to look exactly the way you want it to. ToeTag supports this but it’s not entirely obvious how since none of it is on the main UI.
Creating The Clipping Plane
To create a clipping plane, move to the spot in the 2D viewport where you want the clipping to take place and hold down CMD+OPTION and LEFT_DRAG the mouse. You will see a red line appear like this:
The red line shows you where the clipping plane is in the world space and the smaller red line indicates the normal of that plane. The normal indicates the side of the plane that the clipping will take place on. Meaning, if you execute a straight forward clip then anything in front of the plane will get clipped away.
Note that clipping will only happen to the brushes you have selected.
Clipping
Once you have your clipping plane in place, hit ENTER. You’ll get something like this:
Clipping On The Other Side
If you made a mistake and drew the line the wrong direction, instead of redrawing it just hold down OPTION while pressing ENTER. That will force the clip to happen on the opposite side of the plane instead. Like this:
Splitting
One last thing you can do with a clipping plane is split a brush. This will give you 2 new brushes in place of your old one. To split, just hold down CTRL while pressing ENTER. You’ll get something like this: