A brush that helps a lot when making strings or single hairs
I've used it many times, and I Know that the demonstration down below is not the best but I can asure you that if you need to draw a lot of strings on a single pice, it will be usefull
If you need more or less lineart, you can modify the wattercolor edge size and if you modify the darkness and opacity you can get a tinted lineart so its not all pitch black