In the latest monthly alpha update to the Unvanquished open-source first person shooter are some renderer improvements, art asset enhancements, and much more.
Among the changes for Sunday's Unvanquished Alpha 18 release include new marauder / medistation / reactor models, updated human textures, gloss maps support, and renderer improvements.
Among the renderer improvements include reducing memory usage, shadow weirdness, and processor performance improvements if using the CPU for vertex skinning rather than the GPU. The Unvanquished game is powered by the Daemon engine, which is a fork of the ioquake3 and ETXReaL engine code-bases.
More details on Unvanquished Alpha 18 can be found via the Unvanquished.net