Ribbon 毛刷。具有抖動暗度,可實現類比深度 a ribbon fur brush. has jittering darkness for emulated depth
使用畫筆時,順時針方向的筆觸外側會有邊緣線的刺,逆時針方向的筆刺會讓內側有更純色的陰影。
when using the brush going clockwise will have the spines on the outside of the stroke for edge lines and going anti-clockwise will have the spines on the inside for shading with a more solid colour.