Export Textured OBJ is a plugin for Weland, a map editor for Aleph One and the Marathon series of games.
This plugin exports level geometry as a Wavefront OBJ file, similar to the built-in feature, but it also produces an .mtl file and texture references so that fully-textured levels can be loaded and viewed in other programs.
Note that the texture images must be exported in a separate step; see "pkg-readme.txt" for full instructions.