A ready-to-use 3D debugging scene: ground grid, a floating object tree that lists every scene object, and a minimal floating toolbar. Drag & drop GLB/glTF, OBJ, STL, PLY, 3MF, STEP/STP, IGES/IGS or point-cloud files onto the canvas to load them. Paste text with x/y/z coordinates (one point per line, brackets/commas/labels welcome) to drop named markers. Pick the Marker tool from the toolbar, then click the canvas to drop coordinate markers. Pin sticky notes and save/restore camera views from the toolbar. Uses the Shoelace UI renderer.