Typing a site layout into a prompt is slow, so we added the option to draw on the 3D scene and send the sketch to an AI agent: Colour-coded markup: purple for a changing room, red for a pool, green for a big tree Send it with a short colour legend The agent reads the sketch and the scene and builds editable elements that follow your layout (it even matched the colours) Run multiple agents in parallel, and iterate by sketching again, e.g. "delete this building" Pairs well with satellite mode for quick site massing on the real site. Would you rather brief an AI with a sketch or with text? Written guide: https://harth.build/resources/learning-center/sketch-to-instruct-ai-agents/?i=org-reddit   submitted by   /u/harth_2026   to   r/harthusers [link]   [comments]