Reference model

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Reference.mdl

The Reference.mdl, conventionally named <modelname>.mdl, contains a range of key information for an in game model:

• The model's Filename, used to identify vital data stored in the model's VTX, VVD, PHY files.
• The names of any Sound WAV files used by this model.
• The names of the Skin VMT files used by this model. (or is this in VTX / VVD files ?)
• The names of any Animation Sequences used by this model.
• The names of any Animation Library MDL files used by this model.
• Any propdata attributes this model may have, including
• The names of any Gib MDL files used by this model.
• etc

Each model's 3D Rendering data is stored in the VVD and VTX files, and its Collisionmodel data in its PHY file.

Reference.smd

The reference.smd, conventionally named "<modelname>_ref.smd" or "lod0_<modelname>_ref.smd", contains:

• The skeletal Bone Hierarchy (nodes block).
• The default or "idle" pose (skeleton block).
• The (default LOD) Render Mesh (triangles block), including its:
  • default Skin filename(s),
  • "3D vertex" data (in relation to the model's $origin),
  • "smoothing group" data,
  • "texture map" data,
  • "bone map" or "envelope" data.