It's a rake brush I made using linework from my other sand texture brush. I use it for flat colors and shading when I want to add some grit and texture. The texture is a picture of a fluffy towel from my house and the brush has a sandy texture to it--I was really going for a beach vibe :-]
Here are some close ups of a sketch where I used this brush for the flat colors and then for the shading. It blends well with itself, so it's good for coloring that has some grit but is still soft. The pen pressure settings are a little bit weird.
