First: it works perfectly even with Nemo / Linux Mint.
But not all files will be thumbnailed. It took me some time of confusion to find the reason for that:
There are stl-files out in the wild with different mime-types:
model/x.stl-binary and model/x.stl-ascii
So append this mime-types to the stl.thumbnailer do get also this files thumbnailed
First: it works perfectly even with Nemo / Linux Mint. But not all files will be thumbnailed. It took me some time of confusion to find the reason for that: There are stl-files out in the wild with different mime-types:
model/x.stl-binary
andmodel/x.stl-ascii
So append this mime-types to thestl.thumbnailer
do get also this files thumbnailed