Others selection Mode :
Concave selection mode will select concave polygons only
Non planar will select non planar polygons

	Starting Shape for concave polygons detection
	Activate the concave detection
	Concave polygons are detected
	Starting shape for non planar detection the 2 squares on the right are a bit twisted
	Activate non plananr selection
	Result
	the same option allready exist within Lightwave ;)