Remember when we had to tell graphic designers that they couldn’t control how things looked online? That the lovely page they’d designed might not look like that on someone else’s computer, in someone else’s browser? Soon we’re going to have to do that with everything. Designers are going to have to design things that might or not get made with the specified materials, in the specified way, to the specified tolerances. They’re going to have to design the idea of an object and let the world make it the way it wants to.