Your thoughts and wishes regarding the creation of 3D models for CNC machines

HelloWe are a young team of 3D artists specializing in creating and designing 3D models for CNC machines.We would like to be part of your interesting community and find out what difficulties you are currently facing. As beginners to understand this topic, we would like to know in what direction this industry is currently moving, what problems are associated with the search for models, the operation of machines, and with the production and creation of ready-made solutions, this industry is currently facing.Do you have any thoughts on this? We would be interested to know them.Thanks to all.

Good afternoon, the question is related to the fact that:
1. Finished models may require customization for specific dimensions of workpieces and products. And often ready-made purchased models do not imply any edition other than simple scaling.
2. Also, finished models may require an increase or decrease in quality, the number of polygons, the number of points, as well as a more detailed study of some individual nodes and mates. To optimize machine performance.
If you make models for the machine yourself - great, but I'm wondering what inconveniences the manufacturer faces in the process.

3d model of human face from a simple photo - digital sculpting.
How this can be done?