rail_collada_models includes minified versions of the 3D Collada models and their materials. To properly contribute after you modify a Collada model or materials, do the following:
sudo apt-get install jpegoptim
cd /path/to/rail_collada_models
./scripts/minify.bash
rail_collada_models is released with a BSD license. For full terms and conditions, see the LICENSE file.
See the AUTHORS file for a full list of contributors.