This is a GIMP Script-Fu to create effects like this:
Environment
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tested only with GIMP 2.10.22
Installation
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Download
https://raw.githubusercontent.com/TPKato/gimp-luminous/master/luminous.scmorgit clone https://github.com/TPKato/gimp-luminous.git -
Move (or Copy)
luminous.scmto an appropriate location (recommendation:${HOME}/.config/GIMP/2.10/scripts/if you use GIMP 2.10.x). -
(Re)start GIMP, or Filters > Script-Fu > Refresh Scripts.
Usage
License
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GNU General Public License Version 3



