struct v2f 
{
  float2 Position    : POSITION;  
  float2 TexCoord1   : TEXCOORD0; 
  float2 TexCoord2   : TEXCOORD1; 
  float3 LightVector : COLOR0;   
};
float4 main(v2f IN,
    uniform sampler2D tex1,
    uniform sampler2D tex2, uniform float4 lightcolor) : COLOR
{  
     
  float4 Color1 = tex2D(tex1,IN.TexCoord1);   
  float3 bumpNormal = ((tex2D(tex2,IN.TexCoord2))-0.5)*2;      
  float3 lightVector = ((IN.LightVector)-0.5)*2;     
  float light = dot(bumpNormal,lightVector);
     
  return Color1*light*lightcolor*2;
}