This is a very simple script for method of image processing othen used by myself - splitting picture into a two assembled layers: colors and grain. This gives us a very lot of capabilities of changing picture without making a hard artefacts inside it.
You can read more about the script, with a sample of use here:
p.s. i'm also add a second version - for a slow machines; it do same thing, but by the little diffrent way.
p.p.s. i'm add second tutor, about the people face skin cleaning with this script.
p.p.p.s. added new tutor on the old photo details restoring: