Reference model

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Reference.mdl

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

• The model's Origin, which is used to align its rendermesh, collisionmodel, gibs, etc to the Model Entity's position in the World.
• The Mesh and UV map geometry that is actually rendered in game.
• The name of the VMT file to use as the default Skin.
• The name of the MDL file to use as a collisionmodel.
• The name of any animation MDL files used by this model.
• etc

Reference.smd

The reference.smd, conventionally named <modelname>_ref.smd, contains some of the information that goes into the reference.mdl, but not all of it:

• The default Origin
• Render Mesh vertex geometry
• UV map geometry and default Skin filename
• Skeleton
• etc