ben-day dots

A screentoning technique resembling halftone, using a pattern of dots of equal size, shape, and spacing, which is then applied to a given work to add texture and/or shade.

If the dots are of varying sizes, use halftone instead.

• Danbooru post #1500677: Ben-Day dots over the hair and faces vs Halftone over the background

This tag implicates screentones (learn more).