>>4314509Recently watched this video showing recently deceased artist Syd Mead's work process, and at he says at 51:10 he has painted all his artwork in his career standing up, saying that it frees up the upper body, placing less tension on the wrist that you would have drawing sitting down, and you use your shoulder more standing up, giving you greater control.
51:10
https://youtu.be/tJfscPip3Fo 
