[Eng sub] Disadvantages of perspective-oriented guidelines [drawing basics]

Even books and videos that explain how to draw a column, and sometimes even a teacher, do not have an example that explains without understanding the auxiliary lines (guidelines) when drawing an ellipse. In particular, they are drawing ellipses with tactics while neglecting the theory, limited to those who can dexterously draw the roundness of the ellipse. Make sure that you understand the apparent long diameter and the actual long diameter.
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