The 3d files are stored in one archive.
Each monster mesh is composed of 16 bytes for each vertex in the first part of the file. And then 4Byte connection information near the end of the file.
verX, verY, verZ, 4byte unknown
All the vertexes are connected in sequence except for ones where the Connect is 00, for two consecutive 4 byte arrays
First, Second, Third, Connect.