I remember just piling water on this one, I wanted to get all kinds of bloom, or cauliflowering, or whatever you want to call it. It's the effect of moisture leaching into areas that are more dry from areas that are more wet, and it has a neat effect on the pigment. When this sort of thing happens on accident it's a wonderful way to ruin a nice smooth wash, but it has a very interesting texture when done intentionally.