For me a drawing is the complete process of documenting how the light works with a subject. If a sketch is a quick record of a discovery, a drawing is the detailed transcript of everything about its shadows that I find beautiful. Usually I like to work quickly and in constant flow, so for me drawing is really about mental discipline and slowing down. So hard, but worth it.
Being a process of stillness, my drawings can be from long poses (20 minutes) or from pictures.
You can find more of my drawings here