Photograph any fly and get the recipe back, material by material
One moment…
Show it a photograph and it will also read the fly back to you, material by material, marking which lines it can actually see in your picture and which it is reciting from a pattern name. If the fly is somebody else's work here on Dekasso, we have no way of telling — open their page and press Remix instead, so the credit for it lands with them.
Today this paints you a study — one invented image standing for the idea, not a measurement and not an answer. In time: A tying recipe you can check at the vise, and then an on-ramp to the designer that starts from a fly that exists rather than a blank box.