export mesh to 3dsMAX from ue4 missing materials ID,replaed one materials ID.
Apply a multi-sub material to the mesh, set it to the amount of ID’s, then export.
This should be fixed in 4.13. I had a similar issue where exporting some static meshes from UE4 to FBX would result in combining some material IDs.
As an example some of the window wall meshes from Sun Temple would have 5 material IDs but when you export from UE4 it would only have 4 and combine the 4th and 5th ID into one.
thanks,The Inst materials export from ue4 will be combine to one material IDs.