It isn't in my artistic. Just looked, then looked again.
All of you who just installed G'MIC 220.127.116.11, after you click the Refresh button inside G'MIC, the Ink wash filter will be removed from the Testing/Presets menu.
It will then be found in Artistic > B&W Ink wash. Bob supersleuthed that one.
This got me un-confused. After I posted about finding it, I read AeonTown's post so I started checking my system and discovered I somehow had two versions of GMIC. I cleaned everything out and went and got the current .deb package for my system and installed it, which placed the filters in Presets/Testing. Then I clicked the Refresh button and they moved to Artistic. Odd seeming behavior, but at least everything stopped jumping around.
I'm not saying this has anything to do with Molly's missing filters, it was just a weirdness I encountered.
GnuTux, your camellias look - is "impressionistic" the right word? Very nice!
2-ton, that's a very cool effect. My two kittens are too noisy to be mistaken for spectres.