The difference between "two-drawing" and "three-drawing" is that "three-drawing" refers to adjusting materials, and "two-drawing" refers to hand-drawing two-dimensional animation to make three-dimensional CGI animation effects. In the field of animation, the second is to adjust the material, such as uniform diffuse reflection, judging the shadow range by shadow light, coloring hard edges with equal brightness, adding brush strokes and so on, so that the effect looks close to the traditional hand-drawn 2D animation, which is essentially 3D animation.

How to use "three colors and two shadows"

Three-layer coloring and two-layer coloring are non-photorealistic rendering techniques, which aim to provide 2D hand-drawn textures for 3D graphics. For example, this technology has been used in animation such as Gem Country, People, I am Jiang, Chivalrous Man, Shen Jianxin and Warring States Policy.

Compared with ordinary two-dimensional and three-dimensional animation, the advantages of "three halos and two halos" are that it solves the bottleneck of production capacity, keeps the artistic style of two-dimensional animation, and solves the problem of painting collapse.

At present, in foreign countries, including Japan, a big country in animation industry, three-way animation has become an independent category, which is enough to show its importance to the development of the entire animation industry.