Art with mutliple licenses listed
ok, sorry, I know this must have been asked before, but couldn't find anything after searching the forums a bit, so going to ask:
what does it mean if artists lists two, three or more licenses for a work?
Is it really pick the one you like best? Wouldn't the least restrictive license always trump the others? Alternately, isn't the GPL written in such a way that releasing under another license is not possible?
Seeing alot of CC-BY and OGA-BY combos, but even saw a CC0 + GPL-2.0 pairing, and quite sure those are not compatible licenses.
Yup, pick your favorite license! In the case that someone releases CC0 + any other license, I usually ask the person if that's what they intended to do (it usually isn't).
Typically the least-restrictive license trumps the rest. This only applies as far as you have *compatible* licenses though. I don't believe CC-BY is GPL compatible and vice-versa. For this reason, I think it's probably smart to release with a CC/OGA license *and* a GPL license for maximum art compatibility. (Like the LPC assets are dual-licensed.)
In your two examples, a CC-BY and OGA-BY combo would boil down to an OGA-BY license and a CC0 + GPL combo would be CC0.
CC0 licenses are compatible with everything because those works can be relicensed at will.