Scanning the code to order food, scanning the QR code of the restaurant with the "Sweep" tool of WeChat or other QR code scanning tools is the product of the trend of "Internet plus catering", which can effectively save the labor cost for the restaurant, improve the ordering efficiency of customers, save customers' time and improve the transaction rate of the restaurant. With the craze of "internet plus", the concept of "internet plus" in catering has become more and more popular, and the mobile phone scanning QR code ordering system has become the future trend of catering industry.

Material refers to what texture an object looks like. Material can be regarded as a combination of material and texture. In a rendering program, a material is a combination of various visual attributes of a surface, which refer to color, texture, smoothness, transparency, reflectivity, refractive index, luminosity and so on. It is with these attributes that we can identify what a three-dimensional model is made of, and it is precisely because of this that we have model materials.