What if it were as easy to generate a usable 3D design as prompting ChatGPT? That’s the mission of Backflip, a startup founded by 3D printing veterans that’s just scored $30 million from Andreessen Horowitz, New Enterprise Associates, and a host of other big names in tech. Designing physical objects often requires hours or days of specialized work using computer-aided design software. Backflip CEO Greg Mark and CTO David Benhaim, both founders of 3D printing company Markforged, want to turn that...