Change Light direction in Material event...?

float4 PS (
	float4 tex : TEXCOORD0,
	float4 worldPos : TEXCOORD1 ) : COLOR0
	{
		float4 textureColor = tex2D ( ColorSampler, tex.xy );
		float4 color = vecAmbient * vecLight;
		float fDepth = distance ( vecViewPos.xyz, worldPos.xyz );
		for ( int i=0; i<iLights; i++ )
		{
			float Distance = distance ( vecLightPos[i].xyz, worldPos.xyz );
			float Radiance = saturate ( ( vecLightPos[i].w - Distance ) / vecLightPos[i].w );
			color.rgb += vecLightColor[i].rgb * Radiance;
		}
		color.rgb = saturate ( color.rgb );
		color.rgb *= textureColor.rgb;
		float Fog = saturate ( ( fDepth - vecFog.x ) * vecFog.z );
		color.rgb = lerp ( color.rgb, vecFogColor, Fog );
		color.a = min ( vecLight.w, textureColor.a );
	   return color;
	}

var height = c_trace ( &my->x, &vPos, IGNORE_ME | IGNORE_MODELS | IGNORE_SPRITES | SCAN_TEXTURE );
vec_set ( &my->blue, COLOR_WHITE );
if ( HIT_TARGET )
{
	if ( you ) // if you exits, is the terrain
	{
		if ( you->lightmap )
		{
			BMAP *bmpSkin1 = ent_getskin ( you, 1 );
			var scale = bmap_width(you->lightmap) / bmap_width(bmpSkin1);
			var format = bmap_lock ( you->lightmap, 0 );
			var cX = hit.u1 * scale;
			var cY = hit.v1 * scale;
			var pixel = pixel_for_bmap ( you->lightmap, cX, cY );
			COLOR col;
			pixel_to_vec ( &col, NULL, format, pixel );
			vec_set ( &my->blue, &col );
			set ( my, LIGHT | UNLIT );
			bmap_unlock ( you->lightmap );
		}
	}
	else // hit a block
	{
		reset ( my, LIGHT | UNLIT );
	}
}