Google's Gemini account demonstrated using Canvas in Gemini to code a custom app that designs a vase. The user can change the vase's mathematical parameters, see the result in 3D, and export it as an .STL file for 3D printing.
The workflow compresses parametric CAD into a generated single-purpose app, with STL export as the bridge to physical fabrication. The post is a demonstration and does not establish how reliably Gemini produces printable geometry, which shapes beyond simple parametric objects work, or whether any printability checks are applied before export.