Niku.shader

Shader "Sasa/Meat"
{
    Properties
    {
        _MainTex   ("Main Tex", 2D) = "white" {}
        _DarkColor    ("Dark  Color", Color) = (0.5,0.5,0.5,1)
        _LightColor   ("Light Color", Color) = (0.5,0.5,0.5,1)
    }

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

        Cull Back
        Lighting Off
        ZWrite Off
        ZTest Off
        Blend SrcAlpha OneMinusSrcAlpha

        Pass
        {
            Name "Default"
        CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma target 2.0

            #include "UnityCG.cginc"
            #include "UnityUI.cginc"

            #pragma shader_feature __ UNITY_UI_CLIP_RECT
            #pragma shader_feature __ UNITY_UI_ALPHACLIP

            struct appdata_t
            {
                float4 vertex   : POSITION;
                float4 color    : COLOR;
                float2 texcoord : TEXCOORD0;
                UNITY_VERTEX_INPUT_INSTANCE_ID
            };

            struct v2f
            {
                float4 vertex   : SV_POSITION;
                fixed4 color    : COLOR;
                float2 texcoord  : TEXCOORD0;
                UNITY_VERTEX_OUTPUT_STEREO
            };

            fixed4 _DarkColor;
            fixed4 _LightColor;
            sampler2D _MainTex;

            v2f vert(appdata_t v)
            {
                v2f OUT;
                OUT.vertex = UnityObjectToClipPos(v.vertex);
                OUT.texcoord = v.texcoord;
                OUT.color = v.color;
                return OUT;
            }

            fixed4 frag(v2f IN) : SV_Target
            {
                half4 color;
                color.r = tex2D(_MainTex, IN.texcoord).r;
                color.rgb = lerp(_DarkColor, _LightColor, color.r);
                color.a = 1;
                return color;
            }
        ENDCG
        }
    }
}