LodSection

LodSection
{
 ulong FaceIndexBounds[2];     // lower vs upper (NoOfFaces in this section = (FaceUpperIndex - FaceLowerIndex) / 8
 ulong MaterialIndexBounds[2]; // ODOLV4x only
 ulong CommonPointsUserValue;  // see P3D Point and Face Flags
                               // 0xC9 -> LodPoints 0x0C90003F
                               // LodPointFlags are in a separate table for arma, and in the VertexTable for ofp (odol7)
 short CommonTextureIndex;     //
 ulong CommonFaceFlags;        // see P3D Point and Face Flags
 ///////// // ODOLV4x only//////
 long  MaterialIndex;
 if MaterialIndex ==-1
 {
   byte ExtraByte;
 }
 ulong UnknowLong;             // generally 2
 float UnknownResolution;
 float UnknownResolution2;     // generally 1000.0
 ////////////////////////////////
}

a Material or Texture index with default value (-1) has no face/material associated with it and consequently the bounds are zero

In odol7 TextureIndexes and FaceFlags existed for every LodFace in the LodFace Structure, and repeated (as a block) here.
In Arma they are removed from the LodFaces.

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