Glowing shader with a wave of coloured intensity scrolling through a primary texture (for use in a VR title)

SFS_Footprint.shader

Shader "SixfootSoftware/Unlit/Footprint" {
	Properties{
	  _MainTex("Base (RGB)", 2D) = "white" {}
	  _GlowTex("Base (RGB)", 2D) = "white" {}
	  _Color("Colour", Color) = (1,1,1,1)
	  _ScrollSpeed("Scroll Speed", Range(-50,50)) = 0
	}
	SubShader{
	  Tags { "RenderType" = "Opaque" "Queue" = "Geometry+1" "ForceNoShadowCasting" = "True" }
	  LOD 200
	  Offset -1,-1
	
	  CGPROGRAM
	  #pragma surface surf Lambert decal:add
	
	  sampler2D _MainTex;
	  sampler2D _GlowTex;
	  uniform float4 _Color;
	  uniform fixed _ScrollSpeed;
	
	  struct Input {
		float2  uv_MainTex: TEXCOORD0;
	  };
	
	  void surf(Input IN, inout SurfaceOutput o) {
		float2 glow_uv = IN.uv_MainTex;
		fixed scrolly = _ScrollSpeed * _Time;
		glow_uv += float2(0, scrolly);
		half4 m = tex2D(_MainTex, IN.uv_MainTex);
		half4 c = tex2D(_GlowTex, glow_uv);
		o.Albedo = (_Color * c.r)*m.a;
	  }
	  ENDCG
	}
}