However, the column in the center looks highest. This is due to partially hiding two neighboring columns by raising the base of the central square. Because black circles at the top of the pillars of those two columns should be at the same height, the parts of these shapes cannot be hidden halfway. If these two columns are completely hidden, it is likely that a feeling of the projection of the central pillar is lost. The partial hiding seems better. The secret of the interests of these shapes exists here.
(ii) Hidden circles and sticks
We can find strange structures here and there in the positional relationships between circles and
sticks in Figure 565. For example, the black stick from the second left should exist beyond the black
stick from the third left, considering the situation of the top white circle which overlaps both of the
sticks. However, when you see the white circular board just beneath it, the positional relationship
between the second and the third black sticks is reversed. If we see circles below or on the right,
indeed many strange relationships are hidden. The work will give us a pleasure in finding them, and
give us a strange feeling of space recognition.
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