Using Neon Path for a moving track
I am trying to (mis)use the Neon Path effect to make a moving track on a map.
I have created a track on a black plane by drawing a freehand unclosed mask, then applied the Neon Path to the plane.
If I key-frame the Evolution parameter from 0x to 1x and reduce the Extension parameter to only show a portion of the track (eg 20%) it almost works but at frame 1 the end of the track also glows, equivalent to the extension value (I assume), and gradually disappearing over the first few frames. Is there any way to suppress this? I can't find any other parameter that might help.
Maybe it's just not what Neon Path was intended for?