As part of the conference this week at the Medellin campus of the National University of Colombia, I was able to offer a couple of workshops for the students, something I always enjoy doing. Last Wednesday morning, we met at Botero Square in downtown Medellin, a hub of activity and urban life named after Fernando Botero, whose large, voluminous works are scattered throughout the park.

Here are examples of the sketches that I use to demonstrate capturing the essential structure of a scene.