Sketch an image of the tree you want to use for your mural onto a piece of paper in pencil. Include lush leaves for a bright springtime look. A solid silhouette of a tree with branches alone brings a touch of mystery to the design.
Transfer the design of the tree onto a transparency in marker for a permanent template that you can follow for the tree mural.
Project the transparency onto the wall to give you a basis for your tree mural. Use a pencil to sketch the outline of your tree onto the wall. Situate the tree so that equal portions of the trunk are on each of the two adjacent walls. Extend the branches evenly onto both of the walls.
Follow the lines of the sketch you've made with a paintbrush to fill in your tree mural. Use a single solid color for a silhouette, or paint the tree in realistic shades of brown and green for a more lifelike effect. If you’re painting the tree in color, decide where the light for the mural is coming from, and shade the features of the tree consistently.