code: function filterFallback ( f ) {
  
  		if ( f === THREE.NearestFilter || f === THREE.NearestMipMapNearestFilter || f === THREE.NearestMipMapLinearFilter ) {
  
  			return _gl.NEAREST;
  
  		}
  
  		return _gl.LINEAR;
  
  	}
docs: Fallback filters for non-power-of-2 textures