This example presents a 3D bar chart showing car sales figures for multiple brands across different years, rendered using D3.js and the d3-x3d library. The visualization uses a multi-series bar chart layout, with the x-axis representing car brands and the z-axis (depth) showing years. The chart loads data from a CSV file, parsing it into a structured format where each year contains values for Ford, Chevrolet, Honda, Toyota, Hyundai, and BMW. The code initializes the chart using `d3.x3d.chart.barChartMultiSeries` and applies D3's `csv` and `scaleLinear` functions within an X3D-based rendering environment for interactive 3D exploration.