Want to use a brush texture as a pencil texture


I am currently trying to lineart an animation and I want to use texture from the brush preset as a pencil texture. The one I want to use is dark charcoal. I know there is a regular charcoal option but the film I am working on requires dark charcoal. I’ve tried importing the brush to the pencil preset but it doesn’t work… does anyone know how I can do this?

Thank you!