Thanks! Unfortunately my wagon rut making technique is a top secret family recipe protected by 9 separate patents,,,,,,
Actually, I just covered the road with hoofprints using this set of "Tracks" cover. Then I used the brush tool set at Black line, about 50 pixels wide, 50% hardness and 20% opacity. Then I just drew the ruts by hand.
( The tracks were made by Dragonwolf )