“全因素”素描训练中的虚实关系问题，一直是困扰艺术院校师生的主要问题，也是在实践中较难解决的问题。在十年前我就动手写过“虚实关系”方面的文章，但是思路始终感觉不是很清晰。当时的思维只限制在物体与背景的空间关系方面，也就是只解决了轮廓线的虚实关系问题，而物 The problem of the relationship between the actual situation and the actual situation in “all factors” sketch training has always been a major problem that beset the teachers and students in the art academies and colleges and also a problem difficult to be solved in practice. Ten years ago, I wrote the article on the relationship between the actual situation and the real thing, but my thoughts always did not feel very clear. At that time, the thinking was only limited to the spatial relationship between the object and the background, that is, it only solved the problem of the actual situation of the outline,