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Perspective drawings are commonly used in technical drawing to show an item in 3D on a 2D page. Perspective drawings show an object in 3D getting smaller in the distance.

Single-point perspective - This shows an object from the front in a realistic way as it gets smaller going into the distance. The front view goes back towards a vanishing point, which is a point on the horizon line where all lines meet.

Two-point perspective - This shows an object from the side with two vanishing points. It gives the most realistic view of a product as it shows the item edge on, as we would see it. It is often used to produce realistic drawings of an object.

Single-point perspective is often used by interior designers to show a view into a room, whereas two-point perspective is often used by architects to show realistic building ideas.

Three-point perspective

Three-point perspective is similar to two-point perspective because two of the vanishing points remain on the horizon line. The third perspective point is vertical, which makes the drawing look smaller not only to the left and right on the horizon, but also as the eye looks downward. Three-point perspective is used by many product designers when they sketch a product. It looks the most realistic, but it is also the hardest to draw.