Tips: Upload a photo, then select a material or building feature. Use "AI Detect Surfaces" for roofs/walls. For extensions and dormers, position the concept overlay where the addition would go. Fine-tune by dragging corner handles. Ctrl+Z/Y for undo/redo. Scroll to zoom, Ctrl+drag to pan.

Drag corner handles to align materials. Perspective-correct homography mapping with 24x24 subdivided mesh. Scroll to zoom in/out. Ctrl+click to pan. Add multiple regions for different surfaces.