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;
 }

Quote:

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Because PS 1.0-1.3 cannot do dependant texture reads. Basically, you simply cannot change the texture coordinates in the PS, it's just not supported. On the ASM level, all texture reads must be performed on unmodified texture coordinates.

-Rhuarc

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Quote:

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Quote:

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Because PS 1.0-1.3 cannot do dependant texture reads. Basically, you simply cannot change the texture coordinates in the PS, it's just not supported. On the ASM level, all texture reads must be performed on unmodified texture coordinates.

-Rhuarc

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Correct me if I'm wrong, but wasn't that issue corrected in PS2.0 and higher? I'm (unfortunatly) not at home and can't look at my shader codes, but it seems I had done something like this with a higher version.

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That's what I just said... "Because PS 1.0-1.3 cannot do dependant texture reads. " Thus, implying that 1.4+ all support it
-Rhuarc