Lip tutorial for anon!
Additional info: I find lips a pretty important defining feature when trying to draw people so that they are recognizable, so I’ve learned to really pay attention to their unique mouth shapes! However, since lips are usually quite small on the scale of a full drawing, I don’t use too much detail or contrast on them or they start to distract from other parts of the painting. This is usually the level of detail I stop at (thanks to the scaling trick! :D) since it implies plenty of detail from a distance.
I think I explained my thoughts pretty well, but if you do want more detail (ex for a close up rendering or hyper-realism) check out these other resources below!
I hope someone finds this useful!