What's the difference between light and shadow sketch and structure sketch?

Light and shadow sketch is characterized by using light and shade on the basis of lines as the main means of expression, and emphasizing the lighting effect of objects by changing light and shadow.

Structure sketch, also known as "body sketch". This kind of sketch is characterized by taking lines as the main means of expression, without changes in light and shade, but emphasizing the structural characteristics of objects.

There are three differences between them:

1, different concepts.

The most basic difference between structure sketch and light and shadow sketch is that structure sketch doesn't have so much light and shade, but only slightly takes the boundary line and projection of light and shade, which mainly depends on the thickness of lines to reflect the sense of volume and space of objects.

Light and shadow sketch needs more lines and details to express the light and shadow changes of the object, thus shaping the three-dimensional sense of the object.

2. Different expressions

Structure sketch's characteristic is that he takes lines as the main means of expression, abandons the description of light and shadow changes, and deliberately emphasizes the essential structural features of objects. Without the change of light and shadow, you can't apply light and shade, or you can insert some light and shade relationships appropriately to emphasize the structural characteristics of the object image.

Light and shadow sketch is a powerful stage to express the three-dimensional sense and space sense of an object through the change of light and shadow on the object, which plays an important role in truly expressing the object.

3. Different expressions

Structure sketch is not only an outer contour line, but also some lines that turn your back on us or are invisible. In addition to drawing visible external objects, it also draws invisible internal coherent structures and invisible external contours.

Light and shadow sketch is suitable for three-dimensional representation of the physical structure, various textures and colors of the object, and the sense of spatial distance of the object, which makes the picture image more specific and has a strong intuitive effect.

References:

Baidu Encyclopedia-Structure Diagram

References:

Baidu encyclopedia-light and shadow sketch