This is a paid asset, but now you can download NPR Paint Filter Free.
Detail this asset from Unity Store: Original Link
NPR Paint Filter v2.4 (Latest version)
NPR Paint Filter v2.0
“If possible, please buy the package to support the developer”
Please notice this package works for standard built-in rendering pipeline. “NPR Paint Filter URP” is the corresponding universal rendering pipeline version package.
Turn your game to painterly art-style with a few of clicks !
– Oil paint filter.
– Watercolor paint filter.
– Pencil sketch filter.
– Blackboard drawing filter.
– Halftone filter.
– Cmyk halftone filter.
– Abstract painting filter.
– Blue print filter.
– Pencil dot filter.
– Manga speed line.
– Lego filter.
– Knitwear filter.
– Triangles mosaic filter.
– Rich material parameters.
– Compatible with different unity version.
– Compatible with mobile platform.
– Compatible with any dx9, dx11 and openGL platform.
– Demo and source code included.