The Dewoitine D.520 was France's best fighter in 1940. I found a scan of its original Notice descriptive et d'utilisation in a French regional archive (Haute-Garonne): 168 typed pages and fold-out plates, stamped by the archive on every sheet. I gave it to Claude (Opus 5.5, in Claude Code) with one rule: every dimension has to come from a source, and anything that doesn't has to be labelled as a guess. How it went Claude transcribed the whole manual first (168/168 pages, plates included) into my notes. It then wrote a parametric Python script for Blender, driven over SSH on my Mac. Nothing in the model is sculpted by hand: fuselage stations, NACA airfoils (symmetric 18.7 % at the root, 23010 at the tip), dihedral break at rib 16, control surface hinges, all come from numbers in the manual. A second script measures the finished model against the manual (span, length, wing area, hinge positions, prop diameter, track, control surface areas…) and flags every gap. When two sources disagreed, it went looking for a third one to break the tie. Each visual pass was checked by rendering the model over a 3-view drawing, and against museum photos of the surviving aircraft at Le Bourget, from the same camera angle. The plates did a lot of the work: the instrument panel (plate 39, 15 dials named from their captions), the gun positions (plate 50 bis), the retractable ventral antenna (plate 45), access panels (plate 59), the landing gear fairing (plate 31). Everything that moves is rigged to the manual's deflections: ailerons 30° up / 15° down, elevators ±20°, rudder ±30°, flaps 35°, canopy, gear retraction, prop pitch. Textures are baked PBR (albedo, normal, ORM): rivets, panel lines, access doors, fabric rib tapes, wear and exhaust soot. What went wrong (it was not a one-shot) I reviewed every step with screenshots, and a lot needed fixing: It painted a British roundel (red centre) on a French aircraft. Fixed after I pointed it out. A boolean cut for the rear windows silently deleted the fuselage (7,346 faces → 13). It caught it on a render, and now counts faces after every cut. The wing root fairing bulged the leading edge; the wheel well cut through it. It put the Pitot tube on the wrong wing until it read the line in the manual that says "left wing". A 3-view drawing I trusted had the elevators about 14 cm too deep. The manual's areas, plus a second drawing, proved it. The whole thing took about a day of back-and-forth. The model is still a work in progress ! It would be amazing to end up as an MSFS aircraft. Happy to answer questions about the workflow, or about the D.520 itself.   submitted by   /u/Northern_Slytherin   to   r/ClaudeAI [link]   [comments]