Hi both, I think this has to bear as well with @TomSvilans’s earlier n-gon support shout.
I’m inclined to think it’s easy to triangulate a given ngon on the receiving end, just before pushing into the display pipe, if I’m correct in my mental assumptions, even if that borks sending stuff out again cleanly (in which case @teocomi’s suggestion might help). There’s no silver bullet.
I guess, for exchanges between host software that support ngons (ie, blender) supporting them is fine. For threejs, etc. fallback to triangulation is an acceptable compromise?