A simple crossfade unlit shader for Unity

CrossFade.shader

// Origin: http://guidohenkel.com/2013/04/a-simple-cross-fade-shader-for-unity/

Shader "CrossFade"
{
    Properties
    {
        _Blend("Blend", Range(0, 1)) = 0.5
        _Color("Main Color", Color) = (1, 1, 1, 1)
        _MainTex("Texture 1", 2D) = "white" {}
        _Texture2("Texture 2", 2D) = ""
    }

    SubShader
    {
        Tags { "RenderType" = "Opaque" }
        LOD 300
        
        Pass
        {
            SetTexture[_MainTex]
            SetTexture[_Texture2]
            {
                ConstantColor(0, 0, 0,[_Blend])
                Combine texture Lerp(constant) previous
            }
        }

        Pass
        {
            CGPROGRAM

            #pragma vertex vert
            #pragma fragment frag

            #include "Lighting.cginc"

            sampler2D _Texture2;
            float _Blend;
            fixed4 _Color;
            sampler2D _MainTex;
            float4 _MainTex_ST;

            struct a2v
            {
                float4 vertex : POSITION;
                float4 texcoord : TEXCOORD0;
            };

            struct v2f
            {
                float4 pos : SV_POSITION;
                float2 uv : TEXCOORD2;
            };

            v2f vert(a2v v)
            {
                v2f o;
                o.pos = UnityObjectToClipPos(v.vertex);
                o.uv = v.texcoord.xy * _MainTex_ST.xy + _MainTex_ST.zw;
                return o;
            }

            fixed4 frag(v2f i) : SV_TARGET
            {
                fixed3 t1 = tex2D(_MainTex, i.uv).rgb * _Color.rgb;
                fixed3 t2 = tex2D(_Texture2, i.uv).rgb * _Color.rgb;
                fixed3 diffuse = lerp(t1, t2, _Blend).rgb;

                return fixed4(diffuse , 1.0);
            }
            ENDCG
        }
    }

    FallBack "Diffuse"
}