PS to explain this previous comment:
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Why execution mattered was because the contest was not simply a DESIGN contest. Otherwise, drawings alone would be enough.
The carvers had to prove they could bring their vision to life in 3D.
Here are some examples of the type of errors that counted as flaws, using the subject of this thread as an example.
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Uneven shank taper (in this case "bloat" near the center).
Also, uneven rim width (in this case, at the intersection of panels there are peaks/wide areas).
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Uneven shank / stem transition, and/or "rolled edge(s) of either the stem or shank.
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Curves that have "kinks" or other breaks in their flow.
(Pic follows of a horn-style pipe where every line has perfect flow, to illustrate the concept.)
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Axial alignment of the shank and stem out of whack. (The stem looks to join the stummel angled both downward and to one side, here.)
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Another thing that would have gotten this entry dinged would be the overall thinness of the rim edge.
When a rim is that narrow, it burns. Full stop. Briar has a lower limit, and it's been exceeded here.