https://mytool.cool/blog Notes on colour matting, edge cases and browser-side image processing. en Tue, 27 Oct 2026 12:36:41 GMT https://mytool.cool/blog/ai-cutters-fail-flat-color https://mytool.cool/blog/ai-cutters-fail-flat-color Mon, 26 Oct 2026 00:00:00 GMT Segmentation models answer a different question than matting does. On flat-colour art the difference shows up as eaten outlines, a 1–2px shrink, and edges that are either fully opaque or fully gone. https://mytool.cool/blog/keep-shadow-physics https://mytool.cool/blog/keep-shadow-physics Fri, 23 Oct 2026 00:00:00 GMT A drop shadow is background colour multiplied down, which is why most cutters delete it with the background. Here is the luminance model that keeps it, and where that model stops working. https://mytool.cool/blog/green-fringe-explained https://mytool.cool/blog/green-fringe-explained Tue, 20 Oct 2026 00:00:00 GMT Anti-aliased edges are a mix of foreground and background colour. Keep them and you get a green halo; delete them and the outline gets thinner. Unmixing is the only way out.