If I create a cube in Unity and access the game object and get the mesh, The mesh.triangles shows all of the triangle in the mesh. If I import an FBX object, and access the game object mesh. The triangles, vertices are 0 length. I would like to access all of the triangles and vertices of the imported FBX object.
Select the model in the Assets folder and select the tab ‘Model’ in the Import Settings for the model in the Inspector. There check ‘Read/Write’ for Meshes. Now you can access triangles and vertices of the mesh in scripts.
See also
https://docs.unity3d.com/400/Documentation/Components/FBXImporter-Model.html
