The package has a wrong license. Since it derives from a GPLv2 package, it must remain GPLv2 at least.
The meshes had an unclear license (just authorship) but a comment of the author found at the pointed source reveals his intentions to make it "free to use but not to sell", (a sort of CC-BY-NC)
It was not specified if the changes had to be released with the same license (Share Alike), but as I am the author of the changes to the original meshes, I still share alike "free to use but not to sell"
Finally, I updated the authorship and maintainers as well.
The package has a wrong license. Since it derives from a GPLv2 package, it must remain GPLv2 at least. The meshes had an unclear license (just authorship) but a comment of the author found at the pointed source reveals his intentions to make it "free to use but not to sell", (a sort of CC-BY-NC)
It was not specified if the changes had to be released with the same license (Share Alike), but as I am the author of the changes to the original meshes, I still share alike "free to use but not to sell"
Finally, I updated the authorship and maintainers as well.