如图1所示,虚幻画也可以表现出透明的效果。在这幅图中,两个三角形的部分并没有被删去,而是被印成一种浅灰色,于是映入我们眼帘的是一个看上去像是透明的虚幻的六角星。图2展示的是虚幻画的另一种形式。这幅画中,虚幻图形不是平面的,而是一个等高图形。我们的眼睛往往把两组平行线分开并在它们中间看出一条分界线。任何一组平行线都可以看成是遮盖住另一组平行线的部 As shown in Figure 1, the Unreal Painting can also show a transparent effect. In this picture, the two triangles have not been deleted, but instead are printed in a light grey color, so that what we see is an illusionary six-pointed star that looks transparent. Figure 2 shows another form of fantasy painting. In this picture, the illusory figure is not a plane but a contour figure. Our eyes often separate two sets of parallel lines and see a dividing line in between them. Any set of parallel lines can be seen as covering another set of parallel lines