[Christopher Dinardo]

OH! I haven’t played with that one yet since it seemed to be all about the lightsabers.

[Christopher Dinardo]

There is a way to do it that is a bit of a hack:

Create a keyframe for your shape layer path.

Cut that keyframe

Open Illustrator and paste it into a new document

Apply a stroke color and adjust the stroke’s tapering to your liking

Expand the appearance of the stroke

Copy that object from illustrator

Create a new Solid above your original Shape layer in AE

Paste the Illustrator object onto your Solid

Use that Solid layer (That now has your Illustrator Object as a mask channel) as a Track Matte