ich hab hier noch die performance-lastige Variante (braucht Shader Model 3, es sei denn, du brauchst nur Vertex lighting, dann tuts auch 2)
Code:
#define sat saturate
#define dst distance
#define vlc vecLightColor
#define vlp vecLightPos

float4x4 matWorldViewProj;
float4x4 matWorld;

float4 vecLightColor[8];
float4 vecLightPos[8];
int iLights;

texture entSkin1;
texture entSkin2;

sampler SKIN 	= sampler_state { texture = <entSkin1>;};
sampler LIGHT 	= sampler_state { texture = <entSkin2>;};

float4 VS (	in float4 P : position,
		in float2 T1 : texcoord0,
		in float2 T2 : texcoord1,
		out float4 tex : texcoord0,
		out float3 pos : texcoord1) : position {

	tex.xy = T1;
	tex.zw = T2;
	pos = mul(P,matWorld).xyz;
	return mul(P,matWorldViewProj);}

float4 PS (	in float4 tex : texcoord0,
		in float3 pos : texcoord1) : color {

	float4 color = tex2D(SKIN,tex.xy);
	float4 L = 0;	
	for (int i=0; i<iLights; i++) L += vlc[i] * sat((vlp[i].w - dst(vlp[i].xyz,pos)) / vlp[i].w);
	color = lerp (color,color * (tex2D(LIGHT,tex.zw) + L),color.a);
	return color;}

technique t{ pass p{
	
	zWriteEnable = 1;
	AlphaBlendEnable = 0;
	VertexShader = compile vs_2_0 VS();
	PixelShader = compile ps_3_0 PS();	}}

aber wahrscheinlich is der FFP Effekt für so ein Oldschool Projekt angemessener grin