Stippling

Stippling is the creation of a pattern simulating varying degrees of solidity or shading by using small dots.

In a drawing or painting, the dots are made of pigment of a single colour, applied with a pen or brush; the denser the dots, the darker the apparent shade—or lighter, if the pigment is lighter than the surface.

An example can be seen on the base of the petal insides of Calochortus luteus, a lily endemic to California.

[2] In forensic science, stippling refers to a pattern of gunshot residue burned into the skin that results from close proximity to a discharged firearm.

If the user is willing to take the possibility of failing the procedure and getting permanent, unwanted results they can stipple their own pistols since the procedure only requires either a soldering iron or a small, handheld rotary tool with burr bits.