This is an extension to the Unvanquished texture package exm (and
in the future, ex).
In your map, simply use tex-exms instead of tex-exm as a dependency.
Currently, building depends on the Unix shell sh and the
Unvanquished shader generator sloth. In some directory,
clone the repositories, and run the build script:
git clone https://github.com/UnvanquishedAssets/tex-exm_src.dpkdir
git clone https://github.com/InterstellarOasis/tex-exms_src.dpkdir
tex-exms_src.dpkdir/build.sh
This creates an extended
shader file tex-exms_src.dpkdir/scripts/shared_exm.shader. You can then package the
directory tex-exms_src.dpkdir as usual.