(04-03-2019, 06:26 PM)Wladimir D Wrote: You are not allowed to view links. Register or Login to view.I have big doubts that in the 15th century they knew the basics of descriptive geometry and the combination of types and sections in the drawings, as we understand it at the present time. That's why I began to consider the "allegorical" content of the can.
As your 89v1 example shows, the artist was capable of convincingly rendering complex objects. I guess he did so in an intuitive way, yet he was effective. In 89r1, he seems to be trying something different.
It is certainly possible that he meant that illustration as "allegorical": the idea would be even more plausible if examples of allegorical pseudo-perspective were known.
An alternative is that he pushed his limits too far: he tried to represent something even more complex (e.g. "matrioshka" jars, cross-section, a weird filtration-device with several interconnected parts,....) and failed. Even in this case, examples of similar failures before the rules of perspective were mastered could be illuminating.