Yes, over and over my mentor would drill into my thick cranial mass the need to focus my attention on pushing the energy of my drawing and capturing the flow of light as it wraped across the form of the design.
The flow of light is the one of most important aspects of visual development outside of structural anatomy. Secondary details such as the choice of technique or medium is dependent on your industry deadlines—that’s why I work fast using digital markers or Prismacolor pencils for my commercial projects.
Once you get the concept of rendering the flow of light, you will be able to render in just about any medium because you own the theory that holds it all together. As I began to master the theory of light and shadow, my personal style (if you can call it that) naturally emerged without much thought or effort on my part.
Structural drawing skills along with the ability to render three-dimensional form will theoretically allow you to work in any medium from markers to oil paints, charcoal to watercolors and even crossing over from conventional to digital tools—if you put the time in to learn the programs.