What is line perspective?

The line segments that form a depth angle with the transparent picture and the perspective direction have changed, and the originally parallel line segments appear near-wide and far-narrow until they disappear into a point.

All straight lines that are not parallel to the picture are changed lines, and the perspective direction of the changed lines is different from the original placement direction. Many actually parallel change lines are concentrated in the same direction (vanishing point). Perspective law is an important foundation of modeling, and it is one of the scientific and rational laws that guide the correct observation, understanding and expression of body images in modeling.

Perspective painting:

1. Original Line: Lines parallel to the picture are still parallel in the picture. The original line and the ground can be horizontal, vertical and inclined, and their relative positions remain unchanged in the picture. Parallel original straight lines are still parallel to each other in the picture, and the farther away from the picture, the shorter it is, but the proportion of each paragraph remains the same.

2. Line change: all lines that are not parallel to the picture are line changes, and the changes of parallel lines are no longer parallel in the picture, but concentrate on a vanishing point and disappear at the vanishing point. The farther away from the picture, the smaller the proportion of each line segment.

The above content refers to Baidu Encyclopedia-offline perspective.