The only one issue I can see with the GPL being used for artwork is that it
precludes us from using a large body of data that is licensed on terms not
compatible with the GPL. Some maps and textures are only available on other
kinds of permissive licenses, that however require other restrictions like
attribution of credits to the original authors, and the GPL explicitly forbids
that. However this does not mean that you can't make, for example, a scenery
file derived from them to be used with Flightgear or other application. You
just can't have that scenery included in the default flightgear distribution,
or hosted on the flighgear servers. This is because the FlightGear official
policy is to only distribute GPL or GPL compatible content. Nothing would
however stop a 3rd party from setting up his own server, operating for example
on Creative Commons. As for original content, not derived from 3rd party
licensed data, it can be released on multiple licenses at the author's
discretion. GPL does NOT surrender the copyright, indeed GPL works because the
copyright exists on the original item.
> Date: Fri, 6 Jul 2012 00:26:48 -0700
> From: scrat_h...@yahoo.com
> To: flightgear-devel@lists.sourceforge.net
> Subject: Re: [Flightgear-devel] scenery licence for 2.8 and later
>
> My last comment to this subject.
> I've got permission to distribute some swiss sceneries as GPL but only after
> asking back. Obviously I had to, as the author said first that it needs to
> remain Freeware.-
> Now that's only possible because he bent back a little. But many
> won't or can't do and hence we will lose stuff.
>
> As for old aircrafts etc. I think anyway only the best should be included in
> the standard releases.-
>
> Now, there are example planes of X-plane that use SASL with Lua scripts for
> instruments. In the licence they say: "The instrument folder and subfolders
> are GPL but anything else is copyrighted.
>
> Neat and simple, we're really dragging an old lead foot!
>
>
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