This example shows an interactive 3D scatter plot of the Iris dataset, mapping sepal length, sepal width, and petal length onto the x, y, and z axes. Each point is rendered as a semi-transparent marker in a three-dimensional scene. The visualization is built with Plotly’s `scatter3d` trace type, using `Plotly.newPlot` to render the chart into a DOM element. Data is loaded asynchronously from a CSV file via `d3.csv`, and the axes include colored backgrounds and gridlines to enhance depth perception.