How to see how something works in 3D on your Mac

Start a call with Koi (Fn + ⌘) and ask how something works. Koi explains it out loud and builds a picture beside it while it talks: a sketch on grid paper for flows and ideas, or a 3D model you can turn for things with parts, like an engine, a jet or a circuit board.

We make Koi, so read the Koi part with that in mind. Everything about Koi here is what it does today.

1. Tap Fn + ⌘ and wait for the light round your screen to turn purple.
2. Ask: “how does a jet engine work?”, “show me how to attach the camera”, “explain this in 3D”.
3. Koi says it's building it in 3D. The parts appear one by one while it explains, then labels beside them and the steps in a caption strip underneath.
4. Drag to turn the model, shift-drag or right-drag to slide it, and scroll or pinch to zoom. Click a step to fly to the parts it's about.
5. Ask a follow-up, like “what does the fan do?”, and Koi adds to the same model.

Not everything needs 3D. For a process, a concept or a study question, Koi often draws a card instead: cream grid paper, written in Koi's hand, each box, line and word drawn by its pointer as it talks you through it. Ask for “a sketch” or “in 3D” to pick.

1. Click the download button at the right end of the window's title bar.
2. Pick Save picture (PNG) for a picture, or Save scene (.koi) to keep the model itself.
3. It lands on your Desktop, named after its title. Double-click a .koi file and it opens in Koi, still turning.

• A .koi file opens on your Mac with no AI and no cost.
• The window works like any Mac window: red closes, yellow folds it to a pill in the corner, green fills the screen.
• Left alone, it goes when you hang up or 90 seconds after it's done. Move or minimize it and it stays.

Each picture counts against your plan's Koi, like the call. What to draw, the picture of your screen that question had and the call's language go to Koi's AI once, and nothing of it is kept. Have a manual or a datasheet instead of a question? Drop it on the notch and Koi builds it in 3D without a call. Every step is in Koi's help.