Lines — Coloring pages with or without black shades? (Patreon)

Hey!

I originally planned to do a post about research this week, but unfortunately being a bit sick (just an annoying cold). made me fall behind on some commissioned work, so I'll switch the post and ask for your opinion on a central decision today! Your vote would be very helpful to me!

I was wondering what makes more sense for the coloring pages: Pure outlines, or including the black areas? Both have their advantages - pure outlines give you more freedom, while the shadows give a first direction for a light source, and make the drawing look better more easily.

Please let me know your vote, and if you have a more nuanced opinion about this, I'd love to read it in the comments!

Thanks!Stefan