Making a corner with a drip cap, avoiding those nasty poky points. Drip caps are required on top of windows and doors and horizontal trims that are used to break up the face of the wall. These trim boards usually end up turning a corner, and then so will the drip cap have to be wrapped around this corner.
The following images show how to do this without ending up with nasty sharp points on the corner.
In the image, the G cut, shown in blue, is an approximate cut,
taking off the tip so it will tuck under nicely.