Maya to FBX - Annoying random hard edges, yo.

Joopson

Hey there,
I've been exporting meshes from Maya to UDK for a while, and I've noticed weird hard edges relatively often. I've chalked it up to some sort of issue with my normal maps or something- but, I just imported a bumpy plane from Maya to UDK using FBX, and making sure to check "Export Smoothing Groups" and "Import Tangents", but regardless of any options I have tried, I still get the same polygons being hard edged. I've smoothed my normals about a thousand times, but NOTHING. It is unbearable- I assume all my meshes are corrupted by this nonsense. I remember "Use Explicit Normals", which worked, but it has since been removed. Any ideas on what I'm doing wrong? I'm assuming it is me, and not a technical issue with the programs, but who knows.
Thanks for le help.


EDIT: If I harden all of the edges, it shows up in UDK with all hardened edges. So.... I'm not sure what to do.
Edit Again: So, also, if I uncheck "Triangulate" in the export settings, this doesn't happen. So that fixes my problem. Still, doesn't really make sense why it would create hard edged upon triangulation.

Visceral

Any pictures of this issue?

Also have you checked Tangents and Binormals in the import dialouge.

Joopson

I've checked the tangents and binormals thing- if I don't check it, all the edges get turned hard. Like I said, I found that workaround of not checking "Triangulate" on export, which works for me.

o2_is_alright

I've had problems with this too, but only if I tweak already imported fbx files. If I do the tweak in the Maya file and then re-export to fbx and UDK it works ok. One solution that worked for me was to unlock the normals of the fbx model im Maya and then fix the smoothing again.

m4dcow

The Novemeber version of UDK put back in the Explicit Normals option, so you could try importing with that. I had some issues myself with custom normals and that fixed it.