Simple question about using flat planes as geometry

[Alexx31]

Hello,
I remember I learned once, that I have to use only objects with Tyflow, which are thick meshes and also "watertight" closed.
But actually, Tyflow works also with flat planes.

Which rules are true now?

Thanks

Edit: -> Actually I know from working with cloth planes, that this isn't true.
But there have been some special rules for fracturing, at least a year ago.

[tyFlow]

I'm not sure I understand the question. There are no rules like that in tyFlow.

Maybe you're thinking about how you should disable hole capping if you fracture a flat plane with the Voronoi operator? That's not a rule, just a guideline since otherwise the algorithm will create coincident faces.

[Alexx31]

Okay thanks for clarification!
It's long ago and maybe the tutor did not now in the beginning.

[d4rk3lf]

Fracturing plane isn't a bad idea actually.
You can make pretty detailed fractures that way (using clusters), and after you did all fracturing and clusters, you add an shell operator, and bellow you place PhysX.
That way, at least with fractures and clusters you save some time, instead of fracturing and clustering some high polygon box.