For the effect, you need to specify a size, with the horizontal size first, and then the vertical size.
为实现这个效果，您需要指定一个尺寸，首先是水平尺寸，然后是垂直尺寸。
2
Stay away from horizontal lines, such as horizontal stripes on garments, chokers, and ankle straps, unless you do something to diminish their effect.
不要那些水平线条，比如衣服、项链还有踝袜上的水平条纹，除非你做点别的来削弱它们的效果。
3
By repeating similar pattern in the horizontal direction in this way, both eyes are deceived and a 3d effect is produced. And by changing interval of pattern, depths are changed.