Hi, you probably have the “Optimize Model” option checked. This option reduces 3D meshes definition to optimize the final models’ performance.
You can open a discussion at Twinmotion support page for any further questions 

Hi, you probably have the “Optimize Model” option checked. This option reduces 3D meshes definition to optimize the final models’ performance.
You can open a discussion at Twinmotion support page for any further questions 
