These are the graphics of the Cuyo level Walls
Citing the metadata of that level:
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Comments
I would like to humbly request that the licensing terms be changed to something less restrictive? Using this art in a project could force the entire project to be licensed under the GPL and would turn potential users away from it (like myself).
That is typically the idea of licensing ones art under GPL.
I cannot change the license terms as I am not the copyright holder (assuming that your request was specifically about this level of Cuyo). To approach Immanuel about this, I suggest the mailing list cuyo-devel@nongnu.org
That said, it is quite common to have GPL game code with non-GPL art. Shouldn't it work the other way around as well?
May I ask what the .xcf and .xpm formats are and more importantly what they can be opened in.
.xcf is the native format of gimp (see http://en.wikipedia.org/wiki/XCF_(file_format)). For .xpm see http://en.wikipedia.org/wiki/X_PixMap or my post http://opengameart.org/forumtopic/feature-request-allow-xpm-file-format.
Both can be opened by gimp and converted by imagemagick, which are free and libre so should be available for any platform. Additionally, .xpm can be edited by any text editor.