P3D Lod Edges

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LodEdges

struct
{
   LodEdge   LodEdge1;  //MlodIndex  
   LodEdge   LodEdge2;  //VertexIndex same Count as any of the VertexTable.Counts (odol7)
}

LodEdge

CompressedArray
{
 ulong   nEdges;
 ushort  Edges[nEdges]; 
};

Every vertex in the vertaxtable is owned only by 1 face.

These tables are used to join vertices. Each face has got 3 (or 4) vertices that are unique for each face

For each VertexIndex there is a lookup into the MlodIndex

MLODvertexindex = MlodIndex[VertexIndex[Count]];

Note that compression has not been seen in arma. (not large enough)

Related:

Model File Formats