Picture demonstration of the brushes: mulitple artworks in background, painterly and sketchy with icons of brushes that are connected to part of the drawing to show what type of rendering is possible to get with the brushes.
https://framapiaf.s3.framasoft.org/framapiaf/media_attachments/files/109/712/084/683/356/535/original/56b6eceab114fa98.jpg