This example presents a 3D bar chart visualizing the hourly climbing distances of athletes over five consecutive hours. Built with React and D3.js v5, it uses the `d3.x3d.chart.barChartMultiSeries` API to render the multi-series data as 3D bars, relying on the d3-3d and X3DOM libraries for the 3D scene. The data is fetched from a CSV file using D3’s `csv` function and parsed into a key-value structure before being passed to the chart.