[NeriHyuga]

I personally don't do the first step, but i know many people have problems with fog markings, how they look and where to place them
so i think the sketch can help you to see how you want it to look.
just make lines on the places you want the fog to be, best is you shake your hand a little while sketching, then you have a good base for the wobbly design
important is that fog markings often begin at the face, legs, belly, and back of the horse, it*s a mutated tobiano marking and has the characteristics of tobiano, so often the "arms" can merge together at the beginning