Coin Grading Tutorial. View grading tutorials for currency and other collectible types. Coin grading is done both by adjectives and on a 1-70 numeric scale, and standards are developed enough that most collectors will be able to agree on how a coin should look given how the coin's grade is described.
Two point perspective drawing is a type of linear perspective. Linear perspective is a method using lines to create the illusion of space on a 2D surface. There are three types of linear perspective. One point perspective uses one vanishing point placed on the horizon line. Two point perspective uses two points placed on the horizon line.
Both systems of perspective describe how objects appear in relation to their distance from the observer. This is not so much science as a means of describing, and by interpretation of illustrating, objects in space.t was in Europe during the Renaissance that the concept of linear perspective was finally formalized. Linear perspective is a system for drawing objects that use lines and vanishing points to determine how much an object's apparent size changes with space.