MarsSeed [1] filed a deletion request for openscenegraph-data [2]: Obsolete & unused package from 2017.
Upstream has abandoned these example models/shaders, and has not updated them to be properly compatible with openscenegraph 3.6 [a], first released in 2018 [b], and available in Arch extra repo. [c] [a]: https://github.com/openscenegraph/OpenSceneGraph-Data/issues/9 [b]: https://github.com/openscenegraph/OpenSceneGraph/tags [c]: https://archlinux.org/packages/?q=openscenegraph [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/openscenegraph-data/
