The technology is already here but yeah it’s not easy and probably never will be.

But those wax works or model busts you can scan for a 3D mesh then you use photogrammetry to skin the mesh.

You can do this with any number of frames from a film to skin say an actors head and create a very real version of anyone. But you do need an accurate mesh to skin.

It is in and from this field where the new wave of technology will emerge from virtual reality / augmented reality / 3D scanning and mapping and 3D printing.

The toys of the future based on say a property like STAR WARS will be the actual full scale props scanned and skinned and scaled down and will be practically 100% accurate. And they can be printed out.