Wash-feathering grain factor for a paper ground

How toothy a sketch_papers() ground is, as a number a watercolour wash uses to feather its edges (the grain argument of watercolor_wash()). Smooth grounds wick little; rough grounds (aged, kraft) wick a lot. Smooth, machine papers (notebook / graph / dotted) sit low; the textured grounds climb toward

1. theme_sketch(paper = ) reads this so washes drawn on a paper pick up its tooth automatically.

Usage

paper_grain(kind)

Arguments

kind

A value from sketch_papers().

Value

A numeric grain factor in [0, 1] (0 for "none").

See also

Other sketch-paper: element_sketch_paper(), paper_primitives(), paper_spec(), sketch_papers()

Examples

paper_grain("kraft")
#> [1] 1
paper_grain("graph")
#> [1] 0.15