Mesh vertices changes

I just upgraded my project from 2018.3.14f1 to 2019.3.0f1. I had a function using “MeshFilter.mesh.SetVertices()” so I can change the mesh in runtime.

This is the original mesh:
5265888--526938--1.png

This is what I achieved in 2018.3:

This is what it becomes in 2019.3:

I didn’t change any setting in the fbx in both version. Anyone has idea what has been changed since 2018.3 related to index order or something?

Hi,
Did you test if your model imports also wrong when you disable all import optimizations etc.?

Yes I tried to change “Optimize Mesh” to “Nothing”, looks the same

Edit: I printed out all the vertices and found that the index order changed. Problem solved.