Hi Matt,

I use the blinn-phong algorithm that uses a halfway vector between the view and light directions.
Here is the code:
Code:

float4 BumpSpec_PS(	in float2 InTexN	: TEXCOORD0,
			in float3 InHalfVec	: TEXCOORD1,
			in float  InShadow	: TEXCOORD2)	: COLOR
{
	float3 BumpNormal = 2 * tex2D(NormalMapSampler, InTexN.xy) - 1.0;
	
	// Normalize halfway vector with cubemap:
//	InHalfVec = 2 * texCUBE(NormalizationCubeMapSampler,2 * InHalfVec.xyz - 1) - 1; // doesn't work..

	// Ordinary normalize:
	InHalfVec = normalize(2 * InHalfVec - 1); // Works only in ps_2_0
	
	// Calculate specular:
	float Specular = pow(saturate(dot(BumpNormal, InHalfVec)), SpecPower);
	
	// For debugging you can output the would-be normalized half vector:
//	return float4(normalize(2 * InHalfVec - 1).xyz, 1);  // How it should look
//	return 2 * texCUBE(NormalizationCubeMapSampler, 2 * InHalfVec - 1) - 1; // How it looks with cubemap normalization.
	
	return Specular.xxxx * InShadow * SpecularCoef;
}


Thanks for lookin into it. I could also post the whole shader, or even a demo implementation, if you can't find the error this way and you have the time to look at it..

I want my game to support ps_1_1 hardware and I'd like to enable normalmapping for the first LOD on those cards, so thats why I need ps_1_1 support.

shader tutorial