
If two people collaborate and produce a single
picture, then as others have noted, they are “joint authors” and they jointly
own the associated copyright. Among other things, that means a single author
can unilaterally license the work to anyone and on any terms the single author
sees fit. (There is, however, a requirement to share licensing revenue, if any,
with the other coauthor(s).)
Copyright in
Vietnam
But you might be asking...