Just a thought.
I was looking at an old RobA script last night "taper-along-path.scm" wondering if it could be adapted. Has not worked since Gimp 2.6 but just creates a brush and 'stamps' at close intervals to create the line.
In more modern Gimp, there is the follow path plugin and it is a bit of a monster. The concept might be slimmed down a bit. The other snag of course is the brush opacity very quickly builds up to solid.
however, it looks like this: https://i.imgur.com/xhtEXLH.jpg
I was looking at an old RobA script last night "taper-along-path.scm" wondering if it could be adapted. Has not worked since Gimp 2.6 but just creates a brush and 'stamps' at close intervals to create the line.
In more modern Gimp, there is the follow path plugin and it is a bit of a monster. The concept might be slimmed down a bit. The other snag of course is the brush opacity very quickly builds up to solid.
however, it looks like this: https://i.imgur.com/xhtEXLH.jpg