Glass blowing in non-orientable space — where inside connects to outside and surfaces pass through themselves
Click & drag on the canvas to rotate your view. Scroll to zoom.
Blow mode: Hold Space or click the canvas to inflate the glass form with breath pressure. The glass expands where it's hottest.
Pinch mode: Click on the surface to create constrictions — narrow the neck to form the classic bottle shape.
Stretch mode: Click and drag to pull the surface, extending the neck through itself to create the Klein bottle's signature self-intersection.
Increase Non-Orientability to twist the surface so inside connects to outside. Increase Self-Intersection to allow the neck to pass through the body. When both are maxed, you have a true Klein bottle — a closed non-orientable surface with no boundary!
Use presets to jump to known topological shapes, or sculpt your own impossible glass.