40K Source

//path and name of the final model relative to the sourcemods/yourmod/models folder
$modelname npc/xenomorph.mdl

// Directory of skin materials sourcemods/yourmod/materials folder
$cdmaterials models/npc/xenomorph/

//Sometimes it comes out larger or smaller than expected in-game, use this to adjust it's in-game size
$scale 1.0

//Sometimes it's not where you expect it to be in-game, use this to adjust it's origin (mainly used for view weapons)
$origin 0 0 0

//Check the valve wiki for other surface props
$surfaceprop flesh

//Where are it's eyes (relative to the origin)
$eyeposition 0.000 0.000 128.000

//name of your models refrence SMD
$body studio "reference"

//describe your animation sequences : name , smd file name , acitivity from the valve wiki, weight (if you have several animations for the same activity), the frames per second to play it back at
$sequence idle_lower "idle" activity ACT_HL2MP_IDLE 1 fps 30 loop

// Example run/walk combinging multiple animations into one sequence that can be contorolled by the NPCs angle in-game
$animation a_RunSW run_sW startloop 0 LX LY alignto Idle_lower rotateto 135 fps 30.00
$animation a_RunS run_s startloop 0 LX LY alignto Idle_lower rotateto -180 fps 30.00
$animation a_RunSE run_se startloop 0 LX LY alignto Idle_lower rotateto -135 fps 30.00
$animation a_RunE run_e startloop 0 LX LY alignto Idle_lower rotateto -90 fps 30.00
$animation a_RunNE run_ne startloop 0 LX LY alignto Idle_lower rotateto -45 fps 30.00
$animation a_RunN run_n startloop 0 LX LY alignto Idle_lower rotateto 0 fps 30.00
$animation a_RunNW run_nw startloop 0 LX LY alignto Idle_lower rotateto 45 fps 30.00
$animation a_RunW run_w startloop 0 LX LY alignto Idle_lower rotateto 90 fps 30.00
$animation a_RunZero "idle" loop

$sequence Run_lower "a_RunS" loop ACT_HL2MP_RUN 1 fps 30.00 {
  blendwidth 9
  blend move_yaw -180.000000 180.000000
  a_RunS a_RunE a_RunNE a_RunN a_RunNW a_RunW a_RunS a_RunS
}

//Example technique for creating "gesture" sequences, used by weapons to modify an NPCs exising activity
$animation a_attack "primary_attack"
$animation b_attack "primary_attack" subtract a_attack 0
$sequence attack "b_attack" activity ACT_HL2MP_GESTURE_RANGE_ATTACK_SMG1 1 fps 30 delta

//Shader used for models
"VertexLitGeneric"
{
	//Required, refers to the VTF file for the models colour map
	"$basetexture"	"models/npc/xenomorph/xenomorph_sheet"

	//Required, tells Source this is going to be used on a model
	"$model"	1

	//Optional
	"$surfaceprop"	"flesh"		

	//Optional use the normal maps alpha channel for how shiny to make that pixel and how strong the mapping is 
	"$normalmapalphaenvmapmask"	1  
	
	//Optional, refers to the VTF file for the models normal map
	"$bumpmap"	"models/npc/xenomorph/xenomorph_normalmap" 
	
	//Optional, used for normal mapping
	"$envmap"	"env_cubemap" 

	//Optional, used to tint reflections in the normal map
	"$envmaptint" 	"[1.0 1.0 1.0]"	

	//Optional, used to adjust contrast of reflections in the normal map
	"$envmapcontrast" 1.0	
}