What is the Blueprint Designer?

A parametric drawing tool. You set length, wingspan, fuselage diameter, sweep, taper, dihedral, tail height, deck count and engine layout, and it draws the resulting aircraft as a rotatable 3D wireframe.

Can I use it to generate an image?

Yes. It exports a prompt describing the exact geometry you have built — bounding box, nose-to-wing and wing-to-tail distances, sweep, camera angle — so an image generator follows your proportions rather than defaulting to a familiar airliner shape.

Do I need an account or any software?

No. It runs entirely in the browser, free, with nothing to install.

Blueprint Designer — build your own aircraft

How to use it

From parameters to a picture

Every line on the drawing is generated from the numbers you set, so what you see is what the prompt describes. Change the fuselage diameter and the cross-section changes. Stack decks and the body grows upward rather than outward — the belly line stays put so the landing gear still reaches the ground, and the crown climbs. It goes to eight decks, which is well past anything sane and exactly the point.

The exported prompt leads with the dimensions rather than a description, because image models default hard to familiar shapes. Telling one to draw an aircraft gives you something 737-ish every time. Telling it the span-to-length ratio, the fineness ratio, the sweep angle and the deck count gives you the aeroplane you actually designed.