| Feature | Free Alternative | |--------|------------------| | Stairs | (Extension Warehouse) | | Roofs | Roof by TIG (SketchUcation) | | Framing | Framing by Chris Fullmer | | Terrain | Artisan (free tier) or TopoShaper (free old version) |

Leo sat in his dim home office, staring at a complex residential model in . He had precisely three hours to finish a detailed section with custom spiral staircases and parametric window openings. Doing it by hand would take six.