Sims 3:0x01D10F34

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Object Model LOD

This is a Sims_3:RCOL chunk. LOD means Level of detail. This chunk is found in both .lod and .model files, and it is a the key that maps each mesh group to the appropriate parts of VRTF, VBUF, IBUF, SKIN and MATD chunks. It is the one ring to rule them all.

DWORD   // 'MLOD'
DWORD   type
DWORD   count

repeat count times:

   DWORD   subset_bytes // number of bytes after here in this repetition
   DWORD   unknown purpose
   DWORD   MATD         // or'd with 0x10000000, is relative to this block index
   DWORD   VRTF         // or'd with 0x10000000, is relative to this block index
   DWORD   VBUF         // or'd with 0x10000000, is relative to this block index
   DWORD   IBUF         // or'd with 0x10000000, is relative to this block index
   DWORD   VBUF type
   QWORD   VBUF offset  // in bytes
   QWORD   IBUF offset  // in facepoints (three per polygon)
   DWORD   VBUF count   // vertex count
   DWORD   IBUF count   // face count (one per polygon)
   FLOAT[6] BoundingBox // MinX/MinY/MinZ/MaxX/MaxY/MaxZ for this group
   DWORD   SKIN         // or'd with 0x10000000, is relative to this block index
   DWORD
   DWORD
   DWORD   MATD         // or'd with 0x10000000, is relative to this block index
   FLOAT[6]
   ....                 // depending on type value, additional data may be present, purpose undetermined

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Sims 3:Main Page -> Sims 3:PackedFileTypes
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Based on contributions from karybdis and atavera