only center face for an option on the node

[jmkl]

can we have this only_center_face option on the node?
it become quiet handy when u have blurred crowd as a background.

[Gourieff]

Yeah, I'm going to add smth like that in future updates

[squallseeker]

Something like detect face order "from center outward" would be most appreciated and it would save a lot of time for me (over attempts to exclude faces by manual masking and other methods)