Autodesk, Mirrored Bakes, and UDK

bwithers

Thought I might post this since i've over the years seen this pop up.

Ever had a problem with mirrored bakes in UDK not working as they should? It's Autodesks fault.

It finally appeared in the 2014 3ds max help that there is a known limitation in the FBX exporter such that for a mesh to export tangents and binormals the mesh must first be triangulated.

http://docs.autodesk.com/3DSMAX/16/ENU/3ds-Max-Help/index.html?url=files/GUID-49490C91-E450-4F62-BF5D-F84A1F768959.htm,topicNumber=d30e116569

So thanks Autodesk.

Cheers,

Farfarer

Isn't there an option to triangulate on export, though?

bwithers

Yes there is since as a rule I've always exported pre-triangulated meshes I'm not sure if it's the same I'll test it out in few mintues.

bwithers

the mesh must be triangulated before it is exported triangulating via the FBX does nothing. It's pretty easy to tell jsut switch the exporter into ASCII mode and see what's exported.

kurt_hectic

Double post but threat is talking about the same. I've found solution long time ago:

http://www.polycount.com/forum/showthread.php?t=124923

bwithers

While clever and it may solve problem on the import end on UDK (can't test that here at work); that won't solve the export limitation in FBX. You can check yourself by exporting a model in FBX ASCII and doing a search for tangent or binormal you'll find that they're not in the file even if you checked off the box.