This example visualizes mountain elevation data as a 3D scatter plot built with Three.js and D3. It uses a HiDPI canvas technique with a scale factor of 2 to render crisp points on high-pixel-density displays. The visualization loads CSV data via the d3.csv function and displays each data point as a cube, with multiple cubes stacked vertically to represent elevation values. The scene includes a textured ground plane and supports interactive rotation through Three.js OrbitControls, allowing viewers to explore the 3D data from different angles.