The video below shows a software modeling tool called Beautiful Modeler which uses a multi-touch device like an iPad to sculpt by using hand gestures, via a wireless network. Here’s what its creator Karl D.D. Willis from digital fabrication blog Interactive Fabrication, had to say about it:
Each finger is used to control a single touch point in the model, with multiple layers working to build up 3D volume. As the controller is connected over the wireless network, it can be moved freely to change the viewing angle of the model.
The model itself is presented on the main display rather than on the controller itself; this prevents occlusion of the model when sculpting with the whole hand. The controller screen does not need to be viewed while sculpting, meaning the controller can be rotated or flipped to sculpt from a range of angles.