[joshmillard]

I'll agree that "a near impossibility" feels like a real big overstatement; curves are very doable and common in hand-cut glass. That's true even in my first piece, under discussion, which is chock full of curves. I talk a bit in the process diary about getting comfortable with doing curved breaks after being over-cautious with my first few bits of glass.

That said, I can see how a CNC approach could help with the speed of the process; shallow/simple curves are easy enough to do reliably, but deeper, more complex, and significantly concave curves require additional effort and planning, potentially a lot of manual work with grozing pilers to break out a concavity, and additional grinding to finish out the shape.

So being able to turn a machine process to some of those cuts would save a lot of manual effort and potentially get you right up to the final polish-grind stage in one go, which certainly sounds attractive for some kinds of design.