EyeRefract

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EyeRefract

Description

Todo: Add Pictures and Additional Information.

EyeRefract is the latest eye shader by Valve. It is used in their popular titles Team Fortress 2 and Left 4 Dead. It is a specialized shader that is used on character eyes to increase realism.

There are many other parameters and features yet to be discovered which are found with each new build of Source.

Shader Parameters

Todo: Finish Table.

Shader Parameter	Description	Default Value	Example
$Iris	Base texture to use for the iris.	N/A	"$Iris" "models/cra0kalo/ct_swat/eye-iris-brown"
$Irisframe	Frame for the iris texture, 0 being the default frame	0	"$Irisframe" "0"

---

Example Code

"EyeRefract"
{
 "$Iris"               "models/cra0kalo/ct_swat/eye-iris-brown"     // Iris color in RGB with cornea noise in A
 "$Irisframe" "0"    // Frame for the iris texture, 0 being the default frame
 "$AmbientOcclTexture" "models/cra0kalo/ct_swat/eye_ao"      // Ambient occlusion in RGB, A unused // default texture eyeball_l_ambient 
 //"$Envmap"             "models/cra0kalo/ct_swat/cubemap"    // Reflection environment map static
 "$Envmap"             "models/cra0kalo/ct_swat/eye-reflection-cubemap-"    // Reflection environment map
 "$CorneaTexture"      "models/cra0kalo/ct_swat/eye-cornea"                 // Special texture that has 2D cornea normal in RG and other data in BA
 "$lightwarptexture" "models/cra0kalo/ct_swat/eye_lightwarp"  // 1D ramp texture for tinting scalar diffuse term
 

 "$EyeballRadius" "0.5"    // Default 0.5
 "$AmbientOcclColor" "[0.36 0.25 0.2]" // Default 0.33, 0.33, 0.33
 "$Dilation" "0.4"     // Default 0.5
 "$Glossiness" "1"     // Glossiness of eye (1 is default, 0 is not glossy at all)
 "$ParallaxStrength" "0.25"          // Default 0.25
 "$CorneaBumpStrength" "1.25"   // Default 1.0

 "$halflambert" "1"
 "$nodecal" "1"

 // These effects are only available in ps.2.0b and later
 "$RaytraceSphere" "0"    // Default 1 - Enables raytracing in the pixel shader to make the eyeball look round
 "$SphereTexkillCombo" "0"   // Default 1 - Enables killing pixels that don't ray-intersect the sphere


 //Unknown Parameters
 

 "$eyeorigin" "[0 0 0]" // Origin for the eyes
 "$irisu" "[0 1 0 0]"
 "$irisv" "[0 0 1 0]"
 "$Entityorigin" "4.0"


}
// Eyerefract SDK_EyeRefract 2007 shader used in the popular Tf2 and l4d games
// Check Discussion tab for more params