Crossfade between 2 textures in Standard Shader

Hi Guys,

I am trying to build an extension to the standard shader. I would like the final albiedo to be a blend between the 2 textures that i have.

I am always getting a black object when i decrease transparency completely on the object that has this shrader.

Kindly shed some light on what i am doing wrong here and help me achieve true transparency with a blended shader:


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

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

CGPROGRAM
#pragma surface surf Standard


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

struct Input
{
float2 uv_MainTex;
float2 uv_Texture2;
};

void surf ( Input IN, inout SurfaceOutputStandard o )
{
fixed4 t1 = tex2D( _MainTex, IN.uv_MainTex ) * _Color;
fixed4 t2 = tex2D ( _Texture2, IN.uv_Texture2 ) * _Color;
o.Albedo = lerp( t1, t2, _Blend );
o.Alpha = _Color.a;
}
ENDCG
}
FallBack "Diffuse"
}

thanks,
regards
XeOn