n. blindstory
塔平面八角形，外观五层，夹有暗层四级，实为九层。
Tower level octagon, five stories of appearances, insert dark story of four grades, it is nine layers in fact.
我们要把中间图层里的天空蒙住，使得最暗层的漂亮的层次丰富的天空显现出来。
We want to mask out the sky on this middle layer to reveal the nice rich sky on the darkest layer below.
单击那个最暗的图片，就是你把层拖上去的那个图片。
Click back on your darker image that you have been dragging the layers on to.
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