To begin the right side of the draped start with a stop cut along the lower fold line.
click on photo for a larger view
click on photo for a larger view
Once the stop cut is made, begin by cutting small slivers starting from the edge and working to the stop cut. Cut a series of slivers then deepen the stop cut, this will remove the slivers of wood. At this point the depth is not critical, you just need to remove enough wood to create a trench.
When the lower fold is complete make another stop cut to define the left side of the drape. Use a pointed blade and poke a series of holes along the laser mark.
click on photo for a larger view
click on photo for a larger view
Make small slices from the inside of the drape to the stop cut. These cuts are ver small and shallow to start with, once the stop cut is deep enough larger cuts can be made.
When the grove is deep enough you can take long sweeping cuts along the edge producing a single thin shaving.
click on photo for larger view
click on photo for larger view
Continue cutting until there is a clean sharp division between the right drape and the left drape.
Looking to the center of the drape you can see the angle that was cut along the edge.