Runway Hackathon · Sept 30, 2026

Sewist Studio × Runway

See the dress before you cut the fabric.

I taught myself to sew from TikTok, and I have no one to ask when I'm stuck. Sewist Studio is the live web app I built for home sewists. Today I rebuilt all of its AI features on the Runway API and created 5 new ones, so it shows you the finished garment, on the person you're sewing for, and talks you through the sewing.

7 minute demo, including a live call with Wren. Narrated with Runway text-to-speech. Every image and video in it was made on the Runway API.

Try Sewist Studio Talk to Wren, the live coach Open the full deck

How it uses Runway Dev

See it: reference-first garment renders from the pattern envelope, fabric and wearer photos (Gemini 3 Pro Image and Gen-4 Image Turbo via the Runway API), print close-ups with Magnific.
Move it: Gen-4.5 image to video, with ElevenLabs fabric sound.
Wear it: Aleph 2 video to video puts the planned dress on her in a real phone video, keeping her motion and the room.
Sew it: Wren, a live Runway Character on the React SDK, with a server-side session and two live tools that open your project and search your stash.
Plan it: mood boards on a Runway Model Router that picks the cheapest model, 1 credit a tile.