BrickForgerAI

Turn any prompt into a brick set you can actually build

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September 2, 2026 Prompt to Brick Model Tool

Most "AI LEGO generators" I found online do the same thing: generate a picture of something brick-shaped and call it done. Cool render, but you can't actually buy those bricks and build it - there's no real model behind the image.

So that's what I built. The prompt-to-image-to-3D-mesh part is the easy, already existing half. The hard problem, and the part I actually spent most of my time on, is turning an arbitrary 3D shape into something physically buildable:

- Voxelize the mesh into a brick-scale grid

- Tile it with real, purchasable parts - staggering seams across layers so it doesn't crack apart like a stack of loose bricks would

- Run structural analysis on the result (a connectivity graph, gravity load propagation) to find anything that's not actually attached to the main structure

- Auto-repair whatever's weak - reconnect it if there's a hidden path, otherwise remove it, before it ever reaches you

- Refine the surface with slopes and tiles

Where it's at right now: a few real users are trying it, real generations are completing, but $0 in revenue so far. Working on understanding that part next.

If you want to poke at it: brickforgerai.com

(Not affiliated with the LEGO Group - LEGO® is a trademark of its owner. Part geometry from the LDraw parts library, CCAL 2.0.)

3 Comments

  1. 2

    The $0 revenue with real generations is the interesting part.

    Are users treating it as a fun generator, or asking for outputs they’d actually want to build?

    1. 1
      It is hard to tell exactly - a lot of the prompts seem to be specific and detailed, and a couple users even went so far as to open the Stripe checkout. I think part of the problem is that most builds are very part intensive so even if they are happy with the result and are willing to pay for the instructions, they would not be willing to buy all the parts in addition.
      1. 1
        That’s interesting. The checkout attempts suggest the instructions themselves may have value even when the physical build is too expensive. I’d be curious whether anyone has shown willingness to pay for the generated plans alone, independent of actually building the model.

About

Every "AI LEGO generator" out there just renders a picture. I wanted real output - purchasable parts, structurally verified so it won't fall (Not affiliated with the LEGO Group - LEGO® is a trademark of its owner).