$appendsource
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$appendsource is used to add a new reference mesh to a model with a specified position, rotation, and scale. It is used extensively with VBSP's static prop combine functionality. It is available in 
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Syntax
$appendsource <reference mesh> "offset pos[ <float> <float> <float> ] angle[ <float> <float> <float> ] scale[ <float> ]"
Note:The scale value is independent of $scale.Note:Using an extension in the reference mesh is optional. It will first try looking for an SMD, then a DMX, and then finally a FBX, regardless of what the specified extension is!Note:The syntax of the transformations must be exactly as above - even the spaces must be identical!Example
$modelname props/threebarrels.mdl $scale 6.500 $body body "old_barrel" $appendsource "old_barrel" "offset pos[ -29.564 12.246 0.000 ] angle[ -0.000 -22.500 0.000 ] scale[ 6.500 ]" $appendsource "old_barrel.dmx" "offset pos[ -12.246 -29.564 0.000 ] angle[ -0.000 -22.500 0.000 ] scale[ 6.500 ]" $sequence "idle" "old_barrel"
