By contrast, Josefia Lemon's landscape comprises almost entirely soft edges, yet she, too, creates a feeling of vast space. Go down the list: Value, color, composition and wetness. What decisions has the artist made to bring about this illusion?
These are deliberate decisions, the result of experience in both the nature of the medium and understanding how we see.
Here's a scene with a real collision of shapes.Some work must be done to simplify the picture and get the shapes to separate. Can any of the shapes be combined to make the space easier to read? Which variables would that involve? What can be done with color to keep the background more distant? How about value? Edges?
How many separate buildings do you see in the background at the end of the street? Could they be combined? How can you keep them separate from the group of buildings in the middle distance, right behind the car? Don't forget color temperature as a spacial tool. As a rule, warms advance and cools retreat.
Make a couple of sketches of one of these photos, or, better yet, find one you'd like to translate into watercolor. Experiment with manipulating variables to separate shapes in space. Keep track of the decisions you made so we can discuss them during critique.