Shader "Custom/Billboard" {
    Properties {
        _MainTex ("Base (RGB)", 2D) = "white" {}
    }

    SubShader {
        Tags {"Queue"="Transparent" "RenderType"="Transparent"}
        LOD 200

        Pass {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"
            struct appdata {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };
            struct v2f {
                float2 uv : TEXCOORD0;
                UNITY_FOG_COORDS(1)
                float4 vertex : SV_POSITION;
            };
            sampler2D _MainTex;
            v2f vert (appdata v) {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = v.uv;
                UNITY_TRANSFER_FOG(o,o.vertex);
                return o;
            }
            fixed4 frag (v2f i) : SV_Target {
                fixed4 col = tex2D(_MainTex, i.uv);
                UNITY_APPLY_FOG(i.fogCoord, col);
                return col;
            }
            ENDCG
        }
    }
    FallBack "Diffuse"
}