GunSystem/Assets/shader/Mine/HighLight.shader

// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Unlit/HighLight"
{
	Properties
	{
		_Color("Color",COLOR) = (1,1,1,1)
		_Alpha("Alpha",Range(0,1)) = 1
	}
	SubShader
	{
		Tags { "RenderType"="Opaque"
				"Queue"="Overlay+200"}
		LOD 100

		Pass
		{
			Cull Front  Lighting Off ZWrite Off  ZTest Always
			//Blend SrcAlpha OneMinusSrcAlpha
			Blend OneMinusDstColor One
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			// make fog work
			#pragma multi_compile_fog
			
			#include "UnityCG.cginc"

			float4 vert (float4 vertex : POSITION) : SV_POSITION
            {
                return UnityObjectToClipPos(vertex);
            }
            
            // color from the material
            fixed4 _Color;
			fixed _Alpha;

            // pixel shader, no inputs needed
            fixed4 frag () : SV_Target
            {
                return _Color*_Alpha; // just return it
            }
			ENDCG
		}
	}
}