Brushes come in various shapes including round, filbert (a semi round top and great for portraiture), fan, angular, and the flat brush. Each has it’s own uses.
Caroline Marsland demonstrated the use of the flat brush at class. These brushes come in all sizes. She chose a medium and medium small to show how one could complete a landscape painting using this one shaped brush. A flat brush can make thick consistent strokes or when it is turned on it’s side, will give you fine lines. It is great for blocking in solid shapes of color such as in the painting of the building shown in her demo. She also showed it’s use in blocking in color for trees.