3. Add Background DetailsMake an irregular, jagged line in the background, above the horizon line, to represent a mountain range. Add depth to the posts by using slanted rectangles at the sides and L-shaped lines at the top. Arrange two sets of curving, closely parallel lines for ropes to tie up the boat at both ends. Draw a few straight and curving lines to show the inside of the rowboat. Sketch a few irregular shapes for clouds in the sky.