Unity Shader实现人物透视效果

Shader "Unlit/SeeThrough"
{
    Properties
    {
        _Color("Color", Color) = (1,0,0,1)
    }
    SubShader
    {
        Tags { "RenderType"="Opaque" "Queue" = "Geometry+98" }
        LOD 100
        
        ZTest Greater
        ZWrite Off
        Cull Back

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog

            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
            };

            struct v2f
            {
                float4 vertex : SV_POSITION;
            };

            float4 _Color;

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex); 
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                return _Color;
            }
            ENDCG
        }
    }
}