What is the Feather app? Sketchsoft describes its Feather iPad app as a "next-generation 3D drawing application" that reimagines traditional pressure-sensitive 2D brushes for 3D space.

For patients, Philpotts says, they hardly notice the difference between 2D and 3D. The machines are the same and so is the process, which, of course, can be uncomfortable.

In a blog post and papers, Facebook highlights a pair of AI models that can convert 2D objects into 3D shapes with high accuracy.