SubdivisionLevel makes geo dissapear.

I posted this under ARKit but now realize that it belong here under SceneKit.


I'm trying to subdivide the geometry provided by ARKit's face tracking but

it just makes the geo dissapear. The same happens when I add a Gpu tesselator.


It works fine on any other geometry I provide.


I've tried a bunch of stuff without any luck. Any suggestions?


Thank you.