We are running into an issue with some of our trees exporting with non-manifold geometry in the leaves. A random scattering of half of a leaf's polygons are facing up and the other half down.
sometimes this occurs with geo that comes from speed tree libraries and other times it's happening on leaf geo that I have created from scratch in maya (where it definitely did not have non-manifold geo).
I am wondering if this is a bug or if there is a setting in Speed Tree that will force adjacent poly normals to all face the same direction when exporting.
For troubleshooting sake, I have tried exporting and importing the fbx from speedtree with all the various options combinations, no settings here made any difference.
Any ideas why we are getting non-manifold geo?