3DCoat is on the migration to GTK3 from GTK2 for almost year.
That mean we have 2 versions of 3DCoat for now: 
old, but relatively stable 2024.06, and raw 2024.28.02. 
The easiest way to run it from machines is to run windows version on Lutris. It work quite stable,
Everything work fine, even tablet (Huion SH610), update manager, downloading VDM brushes (that mean internet file downloading works fine too).
Use this as main production version. You don’t need to do some extra settings.
The only thing is switch wine version to “System” because in some case, the tablet work only with this setting.

If you really want Linux version only. Well, for now stable native support is Ubuntu 20.04 for 3Dcoat 2024.06.
Both version tested in Debian 12 KDE X11 and they are working, 2024.06 works more stable just because Debian always has the oldest packages it can run any old stuff.
Also tested 2024.28.02 from my main Mint 22 X11 and it works. You should forget running it on Wayland, because it doesn’t support it yet, but you can try run 2024.06 at least in Ubuntu 20.04 it works well.
If you want to learn more about Linux support i would recommend to read last three pages of “Linux updates news”. That should be enough to understand current situation.
Grakino.
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