Be sure to select exactly 2 vertices, so that MilkShape 3D knows, what edge it has to divide. Such an edge can be shared by 1 or more triangles. You can download it from the MilkShape 3D download page . This is a 3do exporter for MilkShape 3D. The 3do file format is native to Lucas Arts' Jedi Knights. You can download it from the MilkShape 3D download page .
Progressive meshes are useful to reduce the amount of triangles.
This version only works with meshes without holes. You can download it from the MilkShape 3D download page . MilkShape 3D also generates the necessary .UC scripts, which allows users to create UT models in minutes. See the tutorial for detailed instructions. Also included are the latest NOLF plugins .