As the tiltle says, these are gradient map filters. You can apply ot anything to map colours over the source's lightness levels. This time instead of tables, discrete component transfers are used on the alpha values, producing solid colours instead a fading transition. Can be used as a base for a hatching filter.
gradient map filter pack discrete free icon was designed by Lazur URH for icons Png and presented to its users.
Lazur URH
11/25/2017