[Nanomani]

When you add a first movie with "versions manager" the poster is not set by default.
You must set your self the local poster with button "choose art"

You can but don't have to, unless you want different art for the movie group/parent and that version.

Choose Art of Versions Manager assigns art to a specific version.
Outside of Versions Manager screen, versions use the version art first or fallback on the movie art when no version specific art is set.
Choose Art of the Info dialog or the manage context menu assigns art to the movie, which acts as a movie group when multiple versions are defined.

Every idea I tried for artwork had to compromise on something because of the scope limits set for v21 but I could have missed something, feel free to suggest an alternative.

Thanks for your explain.
But something stay confuse/not correct for me.
If I've understood correctly, we manage artwork for a movie without any other version from here:







If the same movie becomes the first in the list of versions, we manage artwork for this the same movie with others versions from here :
But the artworks and the list of artworks doesn't seem to display properly. This behaviour is only for the first movie.







Nothing urgent here, we'll have to wait for the other returns. I know a lot of work is planned for Kodi v22...
Thanks

EDIT : tested with the latest nightly KODI v21
(21.0-BETA3 (20.90.830) Git:20240302-9e44b1c284). Platform: Windows NT x86 64-bit