Hi @kabochow ,
Unfortunately, the level of feature recognition you are describing is not provided with the HOOPS Communicator SDK.
Regarding getting the surface area of a face with Communicator, it looks like @tino was able to to provide some guidance in this post. I would just add that you may also be able to calculate it if you are using HOOPS Exchange (which is part of HOOPS Web Platform). In this case, you’d be working with an additional API and need to link your Communicator and Exchange data.