16/04/2026
There is a principle I keep returning to after thirty years of making mosaics: the meaning of a system is not stored in its components. It emerges from their relationships.
I built Skiagrafia with that principle as a literal engineering rule.
Skiagrafia is a macOS application I have been developing for designers, illustrators, and motion artists. It takes folders of photographs and automatically, in batch, converts them into layered vector graphics and clean, transparent assets entirely on your machine. No cloud. No subscriptions. No data leaving your studio.
The pipeline chains together five specialized AI models, each chosen for one specific job: a vision model that reads what is in an image, a detection model that locates each object, a segmentation model that traces its exact boundary, an alpha matting model that softens the edges, and a vectorizer that converts everything into resolution-independent Bézier curves.
The new article on my blog traces the full story: the first sketch on graph paper, the model selection decisions, the architecture that holds it all together, and the design principles learned across five versions of the system.
The mosaic is never finished. It is always being laid.
Read the full article: tsevis.com/every-pixel-is-a-tesserae
GitHub: github.com/tsevis/skiagrafia