Imagine what this painting looked like when only the first layer was there. There was a sky, but not any background buildings. The whole street and sidewalk level was wet stripes of warm red, cool blue and neutral grey, with no identifiable subject matter. The light blue was destined to become awnings, cars, and figures, but not till the first layer dried and the middle value shapes and the dark layer were applied.
Shari Blaukopf had two or more layers in place before her paper dried. The sky, for example, started as an overall light grey wash. The artist then put in the red where the trees were going to be, and the darker grey just below. It wasn't until the darker middle value shapes were applied (the trunks and branches) that hard edges began to show up. The final layer comprises just a handful of small dark strokes on dry paper.
Here are a few images that can be kept soft-edged for a layer or two. See how long you can wait before you start giving definition to the lights and light middle values.