LuxCoreRender Materials Velvet
The Velvet material represents a diffuse fuzzy, velvety surface. It works well for velvet and other types of cloth. Its appearance can vary wildly with lighting conditions, you may find it easier to use it in a mix with another material such as glossy.
Options
Thickness
This defines the thickness of the "fuzz" along the surface. Higher values will give a more pronounced fuzzy-look.
p1, p2, p3
These are three polynomials that define the appearance of the fuzz. They are rather abstract, so its best to just play around until you get a good result.