It looks like a few artists here are producing multiple paintings or studies per day. How hard are you driving yourself? Do you focus on only one picture until your done with it, or do you prefer to work on several studies at a time? I personally can only work on a single picture since I feel pretty drained after working four to six hours. I spent about five hours on this one but had to stop due to the loss of sunlight. I suppose I'll resume work on it tomorrow hopefully. It still needs a few details.