Section I: Introduction to Flattening 1. Airport ned icons are nothing more than a flat horse. Flattened icons should be flat and flat, and the color should not be too heavy on th ffect will be small and fresh. lding madness 8 Folding wind has more advantages than pure plane. It uses transparent mask to create a slight sense of visual sp 3. light weight 26 Use gradients and shadows to create a certain level, with a slightly three-dimensional effect 3. origami wind Most of them use the effect of shadows. They have obvious geometric sense and strong hierarchical sense. 4.Long projection Long projection is used to make the stereo feel more complete, mainly through editing vertices for design.