This example visualizes the Iris dataset as a 3D scatter plot, mapping sepal length, sepal width, and petal length for one trace, and petal width for another. The visualization uses Plotly’s `scatter3d` and `scatter2d` trace types, rendered inside a `myDiv` element via `Plotly.newPlot`. Data is loaded asynchronously from a GitHub-hosted CSV file using `d3.csv`, while marker styles, colors, and opacity are configured through Plotly’s marker properties. The layout removes all margins to maximize the plot area.