给我写一段卡通PBR皮肤shader

好的，以下是一段卡通PBR皮肤shader的示例代码（基于Unity引擎）：

Shader "Custom/CartoonPBR" {
    Properties {
        _MainTex ("Albedo (RGB)", 2D) = "white" {}
        _NormalMap ("Normal Map", 2D) = "bump" {}
        _Metallic ("Metallic", Range(0,1)) = 0
        _Smoothness ("Smoothness", Range(0,1)) = 0.5
        _EmissionColor ("Emissive Color", Color) = (0,0,0,0)
        _EmissionIntensity ("Emissive Intensity", Range(0,1)) = 0
    }

    SubShader {
        Tags {"Queue"="Transparent" "RenderType"="Opaque"}

        CGPROGRAM
        #pragma surface surf Standard

        sampler2D _MainTex;
        sampler2D _NormalMap;
        float _Metallic;
        float _Smoothness;
        float _EmissionIntensity;
        fixed4 _EmissionColor;

        struct Input {
            float2 uv_MainTex;
            float3 worldPos;
            float3 worldNormal;
        };

        void surf (Input IN, inout SurfaceOutputStandard o) {
            // Albedo
            fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
            o.Albedo = c.rgb;
            o.Alpha = c.a;

            // Normal map
            o.Normal = UnpackNormal(tex2D(_NormalMap, IN.uv_MainTex));

            // Metallic
            o.Metallic = _Metallic;

            // Smoothness
            o.Smoothness = _Smoothness;

            // Emission
            o.Emission = _EmissionColor.rgb * _EmissionIntensity;

            // Specular
            o.Specular = 0.2;

            // Translucency
            o.Subsurface = 0.5;
            o.SubsurfaceColor = c.rgb;

            // Rim lighting
            float rim = 1.0 - saturate(dot(IN.worldNormal, normalize(IN.worldPos - _WorldSpaceCameraPos)));
            o.Emission += _EmissionColor.rgb * rim * _EmissionIntensity;
        }
        ENDCG
    }

    FallBack "Diffuse"
}

这个shader实现了卡通PBR皮肤效果，包括漫反射、法线贴图、金属度、光滑度、自发光、高光、透光和边缘光等。你可以根据需要调整各个参数，使得皮肤看起来更加逼真或是更加卡通。