Rod just published my last filter, Mosaic Stained Glass (thanks a lot Rod !).
You can download it from "Latest GIMP Scripts & Plug-ins" here above.
The filter has the following prerequisites:
a) Gimp plug-ins
-- plug-in cartoonizer.exe
b) G'MIC filters, and specifically:
-- Repair/Inpaint (holes)
-- Contours/Isophotes
-- Patterns/Cracks
-- Artistic/Bokeh
About the plug-in cartoonizer.exe you can download from here:
cartoonizer.
After a lot of attempts done in trying to get something acceptable (Issabella knows all my steps, and from time to time I posted some outcome in Gimp-chat) IMO this last version creates acceptable outcomes in general.
Problematic can be very detailed source images, because as you know Stained Glass simplify the contents, but normal or simple images create quite good results.
As usual, this filter has been tested extensively by Issabella (thanks, my friend!), and she will post some of the many outcomes she got during the tests.
Hope you enjoy it
Download from this page -
http://gimpscripts.com/2016/03/mosaic-stained-glass/edit: once downloaded it goes under menu: Diego / Artistic
Note: it requires also
Bevel Reflect Logo.scm
http://gimpscripts.com/2014/02/bevel-reflect-logo/which requires:
ML Bevel Reflect
http://gimpscripts.com/2014/01/ml-bevel-reflect/thanks MareroQ for underlying that