The //DMD// model format is a custom data format implemented by the [[doomsday_engine]]. A DMD model is similar to a normal Quake [[md2]] model, but there are two key differences:

  *  Up to four Levels-of-Detail can be specified. LODs are additional triangle mesh sets. Each LOD uses the same set of vertices (which is a bit of a caveat).
  *  Vertex normals are stored in a more accurate fashion, which reduces artifacts in lighting and environment mapping.

You can convert normal [[md2]] models into the DMD format using [[doomsday:md2tool|md2tool]] which you can find [[http://sourceforge.net/project/showfiles.php?group_id=74815&package_id=139217|here]].