Playing the strokes twice with different brush settings
.XST Stroke files
Expresii has a stroke recorder but since it's not complete, I didn't make it public. The recorder saves your strokes into .XST (eXpresii STroke) files, which are plain text files. By producing your own .XST, you can actually command Expresii to paint by playing back the strokes.
Ever since the MoXi prototype era, we do give access to animation studios to generate animation frames via stroke files. They use their own way of generating the .XST files e.g. via a script run from their favorite 3D software. The latest work is Find.Find the animation by Studio Biped.
Ever since the MoXi prototype era, we do give access to animation studios to generate animation frames via stroke files. They use their own way of generating the .XST files e.g. via a script run from their favorite 3D software. The latest work is Find.Find the animation by Studio Biped.
Amami Inker web App
Amami Inker is a web app that converts SVG curves to Expresii Paint strokes. It can export to an .XST file, or send the generated stroke commands directly to Expresii Paint app. You can adjust brush size, tilt, pressure profile, wetness profile and more.
The preview is not exact. This is a work in progress. but is already very playable. Head over to the open-source Amami Inker project at Github to get it. The sample horse SVG is from Clipasso. If you can code, or vibe code, it'd be great to see your contribution.
Expresii Stroke API Server
Stroke API service is a new feature of Expresii since version 2026.05.01. You need to start the stroke API server before you can send commands directly from Amami Inker to Expresii:
After starting, an IP address of the machine running Expresii is shown (in the above sample, its "192.168.1.102". The '9000' is the port number).
Stroke Server receving commands sent by Amami Inker web app.
You can now generate Expresii strokes from SVG curves. I hope this opens new doors for you.
Playing the strokes twice with different brush settings
Connecting with AI agent
Teaching a computer to draw objects as simple abstract strokes is not easy. Ever since the Clipasso work came out in 2022, we would like to combine this with Expresii. Down the road, we hope to see AI agents draw/paint things via this interface. A stroke file format description is put online at the Amami github. You can start creating skill files from the description for AI agents. And yes, recent research also allows animation to be generated by simply describing the motion in text!
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