A new Battlezone II patch 1.3 Public Beta 5.1 continues the unofficial support for Pandemic's action/strategy sequel by original programmers Nathan Mates and Ken Miller. The new version has new DirectX 9 performance optimizations (most noticeably in the terrain rendering), re-enables high-res shadows, addresses various crash bugs, and updates the max vertex count for models from 2730 to 20,000 verts/model to allow mod authors to use more complex models.