Yes, i do this in my VS because it did not work in PS.
Why can´t use a temp var to copy and apply that in PS?


Code:

---

struct PS_IN
{
	float2 Shadow		: TEXCOORD0;
	float2 Base		: TEXCOORD1;
	float2 Alpha		: TEXCOORD2;
	float2 Grass		: TEXCOORD3;			
};

struct VS_OUT
{
	float4 Pos		: POSITION;
	float2 Shadow		: TEXCOORD0;
	float2 Base		: TEXCOORD1;
	float2 Alpha		: TEXCOORD2;
	float2 Grass		: TEXCOORD3;
};

//simple vertex shader calculates the vertex position and tex coords
VS_OUT vs(	float4 Pos		: POSITION,
		float2 Shadow		: TEXCOORD0,
		float2 Base		: TEXCOORD1,
		float2 Alpha		: TEXCOORD2,
		float2 Grass		: TEXCOORD3 )
{
    VS_OUT Out = ( VS_OUT ) 0; 
    Out.Pos = mul( Pos, matWorldViewProj );
    
    Out.Shadow = Shadow;
    Out.Base = Base;
    Out.Alpha = Base;		//using base, must be done cause they have no coords (they not applied to level geo, only at runtime)
    Out.Grass = Base;
    return Out;
}

 float4 ps( PS_IN In ) : COLOR
 {
	float4 color;
	float4 shadow;
	float4 alpha;
	float4 grass;
	
	color = tex2D( sBase, In.Base.xy );
	shadow = tex2D( sShadow, In.Shadow.xy );
	alpha = tex2D( sAlpha, In.Alpha.xy );
	grass = tex2D( sGrass, In.Grass.xy );
	
	color = lerp( color, grass, alpha );
	color = color * shadow;
		
	return color;
 }

---