Free:Sea/River Surface Brush
BOOTH
https://t-material-shop.booth.pm/items/469680ENGLISH
https://manga-materials.net/en/product/s-r-surface/If you are using a non-Japanese version of Clip Studio Paint, please make sure to purchase these materials from the English version of the site.
(If you purchase these materials from BOOTH, the files may not be compatible with your version of the software and may not be readable.)