$surfaceprop

"$surfaceprop" "surface property"

• Applies a particular Material Surface Property to the entire model.
• The surface property affects a number of parameters for the model:

its physics properties (weight, etc),

what sounds it makes when it collides,

what particles it emits when you shoot it, etc.

what gibs it throws up when it breaks

• To add or change Material Surface Property types, edit the file hl2\scripts\surfaceproperties.txt.
• HLMV can be used to generate blocks of .QC file that sets the surface properties correctly.