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MarcoP · (This post was last modified: 03-03-2019, 08:07 PM by MarcoP.)

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I agree with much of his interpretation: the illustrator seems to be trying to visualize something unusually complex. Actually, my impression is that the red ellipse at the center-top might correspond to the rim of a cross-section; i.e. an ellipse as the result of cutting a vertical slice through an oval object. But I guess this might be an anachronism?
Also, the alternating yellow-green structures below the red ellipse are quite complex and difficult to visualize as 3D shapes.

I am curious to know if others have specific interpretations to offer, visual analogues or links to other researchers who discussed the subject.