Profile (2D): Click grid to draw outline. Click near start to close loop. Use slider for wall thickness. Optionally, 'Import Image' () to trace, 'Clear Image' (❌) to remove.
Choose Build Type: Once profile is closed, click "Choose Build Type". Select 'Walls' for hollow extrusion, or 'Base/Solid'/'Front/Solid' for a solid object.
Shape (3D): Use touch/mouse to control camera. Use bottom controls to adjust height/depth. Base/Roof controls only apply if you chose 'Walls'.
Add Parts: Add extra components like cylinders.
Export: Save/Load project JSON. Export final model in chosen format.