This was such a different approach for me. My usual method is to walk around, find a scene I like, take some of photos, do a finished painting, and then reuse those things in the studio to create a larger, more finished version of the original composition.
The approach I learned in the workshop spends way more time in the conceptual stage, patiently getting to know the subject through direct observation, working out ideas on location with a pencil and paper. Did I mention NO PHOTOS ALLOWED? Yea, I had to think about that one. While Charles wasn't looking I did take some photos. However, after reviewing the photos along side my drawings from the same place, I see that the drawings are more usable as a starting place for a studio painting. This process is new to me and I'm going to need to prove it out over time. But I think it will result in better design, which in turn leads to better paintings. I still think there is a place for photos in the overall process, but I'm starting to believe that the drawing/conceptualizing stage is better done slowly and on location.