Nsio explains: Simplifying the Complexity by Nsio
(copied from artist’s comments)
Seeing basic shapes
Human body has always been one of the most fascinating subjects of study for artists. It’s also very complex thing, so drawing human body may seem overwhelming at first. However, this is where simplifying kicks in. When drawing complex things, you first need to break it down into very basic shapes, such as cubes, cylinders, spheres, cones and so on. It’s significantly easier to sketch things quickly with basic shapes than actually render the details exactly.