The main blocks of colour have now been washed in, which serve to unify subsequent washes and detail work. The ragged stain lines
are backwashes where the edges of puddles have dried. Normally, I would slope the painting slightly so that it drains to prevent this
happening but on this painting it does not matter as a great deal of texture will be overlaid. Leaving the wash very wet ensures
the pigment sinks in to the "tooth" of the paper (which is like controlled blotting paper), rather than sit on the surface.