To work, a perspective should have <u><em>a horizon line, a vanishing point, and a group of parallel lines that converges to this vanishing point.</em></u> What will create a sense of perspective <u><em>are these parallel lines and the way you'll draw dealing with the lines.</em></u> So, before everything, create your horizon line, think about your drawing and try to understand how you'll deal with the parallel lines.
Unity is when all the elements in a work look as though they belong together. Pattern is a two-dimensional, decorative visual repetition. It uses the art elements in planned repetitions or random repetitions to enhance surfaces of paintings, drawings or even sculptures.
