Shader "Holistic/Rim" {

Properties {

_RimColor ( "Rim Color", Color ) = ( 0, 0.5, 0.5, 0 )

_RimPower ( "Rim Power", Range( 0.2, 8.0 ) ) = 3.0

}

SubShader {

CGPROGRAM

#pragma surface surf Lambert

struct Input

{

float3 viewDir;

};

float4 _RimColor;

float _RimPower;

void surf( Input IN, inout SurfaceOutput o ) {

// Not sure if there is a need to normalize viewDir

// since it looks already normalized.

// Also, saturate here also has no visual effect

// so I leaved a simplified version of code instead of original

// half rim = 1 - saturate ( dot( normalize( IN.viewDir ), o.Normal ) );

half rim = 1 - dot( ( IN.viewDir ), o.Normal );

o.Emission = _RimColor.rgb * pow( rim, _RimPower );

}

ENDCG

}

FallBack "Diffuse"

}