Multiple camera/view on separated windows

Hi,

I am making a simulation application. It requires to have multiple view of the same scene on separated windows (I don't mean split screen). On each windows, user can interact with the scene such moving around, picking objects in 3D, etc...

I have read some threads on this topic. Using Normalized View Port Rect cannot solve my problem since it only splits screen, while my application requires each view on its own window.

Render Texture allows camera to be rendered on a separated windows, but only texture is shown. The interaction with that windows is not possible, right ?

The multiple player solution could allow me to have many instance of the application running on the same PC. This is interesting solution, however it might overload the system since each instance of the application will load its resource such as memory.

Is there better solution. If you know it, please let me know.

Thank you very much.