Gimp 2.10.12 might be the problem, looks to me that 2.10.14 has come some way implementing better backward compatibility.
I have an updated national-geographic script in the archive. This a try out in samj portable 2.10.13 (sorry no 2.10.12) Seems to work ok. In the Filters -> Generic menu
screenshot: https://i.imgur.com/ReuSlio.jpg
...and throw in another to try out. A script that uses the gmic_gimp plugin. Beware, this one is very slow. Looks like it has crashed and it will crash if you start clicking-here-and-there. Leave it and you get there eventually. In the Filters -> Artistic menu
screenshot: https://i.imgur.com/PnHo2uq.jpg
Have to confess I like Dave Hill's work, if you look at the originals difficult to reproduce with a script. They were all about physical lighting. bursts of photographs and lots of processing to get that HDR effect.
The two scripts elsamuko-national-geographic-2-10.scm and hillustrative-gmic-qt-210.scm zipped and attached.
(edit: ng script updated)
I have an updated national-geographic script in the archive. This a try out in samj portable 2.10.13 (sorry no 2.10.12) Seems to work ok. In the Filters -> Generic menu
screenshot: https://i.imgur.com/ReuSlio.jpg
...and throw in another to try out. A script that uses the gmic_gimp plugin. Beware, this one is very slow. Looks like it has crashed and it will crash if you start clicking-here-and-there. Leave it and you get there eventually. In the Filters -> Artistic menu
screenshot: https://i.imgur.com/PnHo2uq.jpg
Have to confess I like Dave Hill's work, if you look at the originals difficult to reproduce with a script. They were all about physical lighting. bursts of photographs and lots of processing to get that HDR effect.
The two scripts elsamuko-national-geographic-2-10.scm and hillustrative-gmic-qt-210.scm zipped and attached.
(edit: ng script updated)