Use
How To Test This Base
- Click Load Square to start from one simple room.
- Inside the editor, keep the pointer tool active.
- Click and drag a wall edge, not the empty room interior.
- Use Analyze Current State after each edit to capture geometry evidence.
The current vendor base is wall-draw-first, not adjacent-room-drag-first. The asset 404 you may see is a broken texture swatch, not the room geometry engine.