Script-Fu -> Color pencil
This is a non-adjustable script which renders the original image with a a slightly thatchy (more a mild crossh-thatch than a simple angled stroke.) makes the image a bit softer, as if brushed with a light hand.
; This script should be placed ; in the user or system-wide script folder. ; ; Windows Vista/7/8/10) ; C:\Program Files\GIMP 2\share\gimp\2.0\scripts ; or ; C:\Users\YOUR-NAME\.gimp-2.8\scripts ; ; Windows XP ; C:\Program Files\GIMP 2\share\gimp\2.0\scripts ; or ; C:\Documents and Settings\yourname\.gimp-2.8\scripts ; ; Linux ; /home/yourname/.gimp-2.8/scripts ; ; Linux system-wide ; /usr/share/gimp/2.0/scripts ; ; ALSO NEED TO COPY: ; ev_coloredpencil.txt ; ; Windows Vista/7/8/10 ; C:\Program Files\GIMP 2\share\gimp\2.0\gimpressionist\presets ; or ; C:\Users\YOUR-NAME\.gimp-2.8\gimpressionist\presets ; ; Windows XP ; C:\Program Files\GIMP 2\share\gimp\2.0\gimpressionist\preset ; or ; C:\Documents and Settings\username\.gimp-2.8\gimpressionist\presets ; ; Linux ; /home/yourname/.gimp-2.8/gimpressionist/presets ; or ; Linux - system-wide ; /usr/share/gimp/2.0/gimpressionist/Presets