This example visualizes car sales from 2010 to 2019 as a 3D bar chart, with each manufacturer’s yearly values rendered as a series of extruded bars. It uses the `d3-x3d` library to bridge D3.js with X3DOM for WebGL-based 3D rendering, alongside `d3.csv` for data loading and D3 v5 scales and axes for layout. The chart is built with `barChartMultiSeries`, and data comes from a remote CSV containing monthly sales figures per manufacturer.