Does the artist sell, every sketch they make? Or are there special ones, the ones they care about? the ones they detail to perfection?

Correct. I almost never make standalone sketches. My focus is always on creating specific high quality artworks for select themes. Don't get me wrong, I do a ton of rigorous studying, tracing, and sketching, over and over and over. But my practice is always in the pursuit of making a single high qua...