Three major surfaces: backlight surface, light receiving surface and light measuring surface. That is, black, white and gray.

five major tones: bright surface, gray surface, boundary between light and dark, reflection and projection.

Objects produce light and shade under the illumination of light, and all objects are composed of many surfaces with different sizes. The direction of each surface is different, and the angle of receiving light is also different, which forms different levels of depth, which is generally called "five tones of light and shade"

Establish the overall sense of tone in the picture, that is, the relationship between black, white and gray, and make good use of these major tones to unify the picture and show the overall effect of the picture.

Tones are black and white levels with different brightness. It is the amount of light reflected by the surface, that is, the depth of the surface. The level of tone should be good at summarizing and generalizing. Different sketch tones reflect different personalities, styles, hobbies and concepts. In the three facets, there are many obvious differences according to the intensity of the received light, forming five tones.

In addition to the bright tone of the bright surface, the gray tone of the gray surface and the dark tone of the dark surface, the dark surface appears "reflection" due to the influence of the environment. In addition, at the junction of the gray surface and the dark surface, it is not affected by the light source and the reflection, so the darkest surface is squeezed out, which is called "the junction of light and shade".

this is what we often call the "five major tunes". Of course, the actual painting is not only the tone of these five, but also richer. But at the beginning, we should at least grasp these five tones well. Establish the overall sense of tone in the picture, that is, the relationship between black, white and gray, and make good use of these major tones to unify the picture and express the overall effect of the picture.

Extended information:

Frequently asked questions in five tones

1. Boundary between light and shade: Because it is influenced by ambient light and is not illuminated by main light sources, the contrast is strong, giving people the deepest feeling tone.

2. Reflection: The dark part will be reflected by the surrounding objects. As a dark part, reflection is generally darker than the deepest middle color in the bright part.

3. Projection: a part of the shadow of the object itself. It looks like a big color block, and it is also a five-tone color. The edge of the projection is clear both near and far.

4. Bright surface: it is the place where the object is exposed to direct light. This part receives the most light and the tone is light. The light receiving focus of the bright part is called "highlight", and generally only smooth objects can appear.

5. Gray surface: it is the part of the object that is sidelined by light, and it is the transition zone of the boundary line between light and dark, with close color levels and rich layers.

Baidu encyclopedia-three sides and five tones