(03-21-2023, 09:00 PM)bicyclesonthemoon Wrote: And I would really like to have a preview for this.
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Could this be achieved using scripts, plugins, etc?
Maybe a GEGL plugin can do the things you would like all at once, that might be possible, Beaver can tell you, he does do GEGL plugins, for example > https://www.gimp-forum.net/Thread-GEGL-S...new-plugin
The big advantage of GEGL is it has preview and splitscreen preview directly on the canvas, and maybe sooner that expected > non destructive abilities
Maybe you don't need a plugin, but just few lines of code in the GEGL graph (Filters > Generic > GEGL Graph...) to write something like this: