So far tmw exclusively uses GPL as license for all it's content, but the GPL was written with software/code in mind, and some of its aspects doesn't apply well on graphics and music.
Here's a summary of what the CC-BY-SA means: http://creativecommons.org/licenses/by-sa/3.0/
The full license text can be found here: http://creativecommons.org/licenses/by-sa/3.0/legalcode
The core points are:
Which is the same spirit as the GPL license.Attribution — You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
Share Alike — If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.
What would be different for our workflow is to add a file which lists the author and contributors of all graphic and music files, similiar to this file from evol: https://gitorious.org/evol/clientdata-b ... er/LICENSE
Alige and Reid have been working on contacting tmw artists and asking them to dual-license their work additionally under the CC-BY-SA. As far as I know they got the agreement of most artists, so it might be possible to switch to use CC-BY-SA mainly, or even only at some point.
What I would like to discuss now is, wether you like the idea, if there are any reasons against doing this step and if there are any pitfalls or obligations we're overseeing. (And who would votunteer to help creating the license/authors file )