FBX is rearranging our UV order, any ideas?

schmaled

Using - Maya 2017 sp2 with fbx exporter 2016/2017

What's happening --
- I've arranged my UVs in a specific order that correlates to what they need to be inside our Unity shader
- When opening in Unity things aren't as expected
- Import the game file (fbx) into Maya to see what's up
- UVs have been reordered

Any ideas?

schmaled

Other things I've tried:
- exporting with fbx 2014/2015 exporter, same thing
- exporting as dae, UVs are then correct

Eric Chadwick

You could try triangulating before export. I know it solves a similar issue when exporting FBX from 3ds Max to Unity.

schmaled

Hmm, I'll give that a try on Monday and see what happens. Thanks for the idea.

kwyjibo

i had similar issues once, can't remember exactly what caused it. But if i recall correctly making sure that the first map is called map1, and having it be active in the UV editor on export helped. 

schmaled

Thanks for the tips @Eric Chadwick and @kwyjibo
Tried both right away this morning, no luck yet.

schmaled

Alright, with my brain fresh after the weekend I have figured it out.

Was something to do with that model specifically:

- I had rearranged the UV channels in Maya
- Maya somehow got stuck with the previous order in that model
- So when exported to fbx, it reverted back to that prev order

Fix:
- good ole cube-combine

Hang my head in shame, thanks again guys for trying to help me.