Kudos for all of you who use GIMP. I had corel paintshop pro for a while and loved it, then I lost it when my computer crashed and have had to stick with GIMP. Sorry to say I hate it. I can't ever figure out how to do anything. I'll try to find some work. I mostly did a little sketching in it, but Idk about manips.
Theres probably a better way, but what I did was I made a new layer, then drew a few large white dots onto the layer and began to bled them. After a while you can make them so thin that they're transparent, and then you shape it onto the horse's legs. It takes a while but its worth it xD