Guys, I probably found out what’s the case! It’s easy to fix!
I always ignored the error message when importing any FBX file, because it was always there and it didn’t do anything. Here is the message:
No smoothing group information was
found in this FBX scene. Please make
sure to enable the ‘Export Smoothing
Groups’ option in the FBX Exporter
plug-in before exporting the file.
Even for tools that don’t support
smoothing groups, the FBX Exporter
will generate appropriate smoothing
data at export-time so that correct
vertex normals can be inferred while
importing.
Well, it tells the exact problem we have.
I’m using Blender so I’m sorry for not delivering the answer for 3d Max. I believe you will find it in your program too!
So, if you use Blender, when exporting FBX file, there are settings which looks like that:
Just change “Smoothing” from “Normals only”, to “Face” (or “Edge” if you need).
I hope it will fix it for you. Let me know!