Real-time computer engraving machine is widely used in industrial design and mold design/jewelry design, and is also limited to simple models.

The University of Technology Sydney where I work has a three-dimensional engraving machine produced by Mitsubishi in 2007. It only supports three-dimensional data in CAD format and has extremely strict requirements on size. The three-dimensional model must be set at a certain angle according to the software provided by that machine, and the carving cannot be successfully completed with a difference of 0.01mm.

It takes about half an hour. You can see that the machine carved a 40cm x 20cm polypropylene block into a model with high accuracy, but many details were omitted.

Therefore, I personally think that this computer engraving machine which can support zbrush to output organic modeling has not been popularized. But it doesn't prevent us from imagining and paying attention.