When multiple users simultaneously view and/or collaboratively develop a three-dimensional (3D) model using respective independent computing devices, one of the participating users may locally modify a viewpoint of the 3D model, and the viewpoint changes are automatically propagated in real-time to the other users. A viewpoint may correspond to a positioning, an orientation, a zoom degree, an angle, etc. of the 3D model as would be provided by a virtual camera trained on the 3D model. The multiple users may share a common viewpoint of the 3D model in real-time in addition to viewing and/or participating in the generation and modification of the 3D model in real-time. In an embodiment, only one user at a time may be allowed to control the viewpoint modification of the 3D model.