The artist also shared the material editor graph behind the project.
3D Environment Artist and Level Designer GC Sozzi has demonstrated a cool paint stroke mask made in Unreal Engine 5 that allows the artist to add stylized strokes onto models. According to the creator, the setup was made by making a material function that contains the paint stroke mask and plugging it into the master material. The artist commented that the tool is highly customizable and can be used to get smooth stylized details.
And here's the material editor graph behind the tool: