// imitation of the Unreal Engine 1.x bMeshEnviroMap effect, not 1:1 but gets close
void SetupMaterial( inout Material mat )
{
	vec3 eyedir = normalize(uCameraPos.xyz-pixelpos.xyz);
	vec3 norm = reflect(eyedir,normalize(vWorldNormal.xyz));
	mat.Base = getTexel(norm.xz*.5+.5);
	mat.Normal = ApplyNormalMap(vTexCoord.st);
}