Sketch the building you want, the way you would on paper.

Sketch a building from a blank scene — describe it, Gróa drafts it, you shape it.

Building modelling · how it works

Sketch the building you want, the way you would on paper.

Sketch a building from a blank scene — describe it, Gróa drafts it, you shape it.

01 — SAY WHAT YOU WANT

A sentence in.

"A two-storey house, 160 m², gable roof, south-facing deck." Or upload a sketch. Ginnung hands the brief to Gróa, our generation agent, who writes Lite-STEP and compiles it to a real IFC 4.3 model.

02 — DRAG, NUDGE, ITERATE

Then you shape it.

Edit elements directly in the canvas. Ask for changes in chat. The model lives at LOD 100–200 — site, massing, generic elements — the right fidelity for early decisions and planning conversations.

03 — TRAVELS WITH YOU

Hand off via IFC 4.3.

When the heavy detailing starts, export to IFC 4.3, GLB, or PDF drawings and continue in your existing BIM stack. The Lite-STEP DSL Gróa writes is open source.

Start now. It's free during the launch.

No install. No credit card. Sketch a building from a blank scene — describe it, Gróa drafts it, you shape it.

Building modelling