Accidental anaglyph 3d shader

AnaglyphEffect.cs

Shader "Hidden/Anaglyph Effect" {
Properties {
  _MainTex ("Base (RGB)", 2D) = "white" {}
}

SubShader {
	Pass {
		ZTest Always Cull Off ZWrite Off
		Fog { Mode off }
				
CGPROGRAM
#pragma vertex vert_img
#pragma fragment frag
#pragma fragmentoption ARB_precision_hint_fastest 
#include "UnityCG.cginc"

uniform sampler2D _MainTex;
uniform float _TexWidth;
uniform float _TexHeight;

fixed4 frag (v2f_img i) : COLOR
{
	float uvPixelWidth = 1 / _TexWidth;
	float uvPixelHeight = 1 / _TexHeight;

	fixed4 original = tex2D(_MainTex, i.uv);
	for ( int h = -4; h < 4; ++h ) {
		for ( int j = -4; j < 4; ++j ) {
			fixed4 neighbour = tex2D( _MainTex, i.uv + (h * uvPixelWidth) + (j * uvPixelHeight) );
			original.gb = neighbour.r;
		}
	}
	return original;
}
ENDCG

	}
}

Fallback off

}