This 3D bar chart visualizes the frequency of car brands from a TSV dataset. Each bar is drawn as a set of SVG polygons, with perspective projection applied to simulate depth. The chart uses D3 v3 with a custom `bar3d` generator to compute visible faces (front, top, left, right) based on a configurable camera position, and renders animated transitions when faces update. Hovering highlights the bars in red, and axes are included for reference.