BrickForgerAI - Turn any prompt into a brick set you can actually build
Type a prompt, get a buildable brick model - with a .ldr file, full parts list and step-by-step PDF instructions. Two modes: Voxel sculpts organic shapes from a generated 3D mesh, and Detailed (beta) uses semantic reasoning to write a short plan that my own brick engine builds piece by piece with real techniques - curved slopes, windows, wheels, sideways building. Every connection is checked so the model holds together. Choose the size and finish, browse and buy builds on Discover.
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I launched BrickForgerAI here a few weeks ago, and I'm back with a big update. Here's why.
Why relaunch now
Claude Opus 5.5 is a big step up in spatial reasoning, and that made an approach possible that wasn't before. The original BrickForgerAI turned your prompt into a picture, the picture into a 3D mesh, and then filled that mesh with bricks. It worked, but the AI never actually thought about bricks - it was a workaround from before models could reason well about 3D space. With Opus 5.5, the model can plan the build itself: what goes where, how the parts connect, and which techniques fit the shape.
What's new: Detailed mode (beta)
This isn't just an Opus wrapper. The building techniques (including SNOT/ sideways building, ball joints and much more) live in my own engine: how to shape a curved slope, fit a window, mount wheels, or attach something sideways (studs not on top). Opus 5.5 only writes a short plan, and the engine turns it into hundreds of real, connected pieces and checks every connection. If part of the design wouldn't hold together, it goes back to be fixed before you see it.
Because the engine does the heavy lifting, a build takes a seconds-minutes in stead of minutes-hours and costs far less than having Claude place every piece itself.
To be upfront about the trade-off: the results aren't polished yet (hence beta). The engine only knows the techniques I've built into it so far, and it will keep improving.
In Detailed mode you can choose:
the build size (16 to 32 studs across)
a smooth tiled finish or studs showing
how much sideways building to use
It works best on buildings, vehicles and animals. It costs 2 credits a build, and if a design can't be made to hold together, both credits are refunded automatically.
Also new
A fully revamped UI, with day, evening and night scenery
Can now choose across a wide range of build sizes as opposed to just small, medium, and large
Voxel mode (the original pipeline) is still there for organic shapes, at 1 credit
Every model still comes with the .ldr file, a full parts list and step-by-step PDF instructions, and you can browse and buy other people's builds on Discover.
I'd love to hear what you build with it, and especially where Detailed mode falls short - that tells me which techniques to add next. Thanks for checking it out!
BrickForgerAI isn't affiliated with, endorsed or sponsored by the LEGO Group.