XiuXianGame/Assets/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_Clip.shader

Shader "Hidden/Clip"
{
	Properties
	{
		_A ("_A", 2D) = "white" {}
		_B ("_B", 2D) = "white" {}
		_C ("_C", 2D) = "white" {}
	}
	SubShader
	{
		Pass
		{
			CGPROGRAM
			#include "UnityCG.cginc"
			#include "Preview.cginc"
			#pragma vertex vert_img
			#pragma fragment frag

			sampler2D _A;
			sampler2D _B;
			sampler2D _C;

			float4 frag( v2f_img i ) : SV_Target
			{
				float4 a = tex2D( _A, i.uv );
				float4 b = tex2D( _B, i.uv );
				float4 c = tex2D( _C, i.uv );

				clip(b - c);
				
				return a;
			}
			ENDCG
		}
	}
}