ale;

	#ifdef USE_TANGENT

		normal = normalize( vTBN * mapN );

	#else

		normal = perturbNormal2Arb( -vViewPosition, normal, mapN, faceDirection );

	#endif

#elif defined( USE_BUMPMAP )

	normal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd(), faceDirection );

#endif