Parallel perspective — towards a single vanishing point on the horizon line.
Using a horizon line to represent the horizon, creating distance.
Angular perspective — using 2 vanishing points on the horizon line to see the subject at an angle rather than straight infront or side.
3 vanishing points — Creating height and an angular view, looking down at a subject.
errors. too intense of a line with relativity to distance. non parallel lines when it comes to things that need to be symmetric. Not having a 90 degree angle on the forefront on a subject with the angular perspective.
drawing a circle rather than a cube or straight sided face shape. I found this to be a little harder to execute in exercise 4. Harder to make perfectly symmetric since its free hand with the assistance of a square/cube drawn earlier.
dividing into equal planes is more difficult because you need to take into account of the distance present.