A 3D bar chart visualizes annual car sales from 2010 to 2018 using an SVG scene with perspective projection. The bars use a powder-blue front face, blue top, and darker side faces, with pink hover highlighting. The visualization is built with D3.js (version 3.4.8) and lodash, using the custom `bar3d()` function and `perspective()` utility to project 3D coordinates onto 2D space. Data comes from a TSV file, and light animation is supported via D3’s `transition` API.