Cross-Contour to Cube

A quick sketch I did earlier (freehand) to show how easy it is for me to visualize with cylinders.

Personally, I find cube hard to visualize freehandly at the moment. Currently I’m thinking with Cylinders and Spheres, but will eventually want to think with Cube to be more perspective-minded. I was experimenting with cross-contour and came to realize that this just might be the bridge to thinking in Cube!

Draw the Cube on top of the bean shape, using the centerline as guide