Reported for the third time, and the first two answers were wrong in the same
way: I treated "it should not be visible" as a number to reduce rather than a
rule to satisfy. The bench's through-tenons went 42 mm proud, then 3 mm, and
3 mm is still a raised patch with a lit edge on it — visible in the render,
and the thing being complained about. The market stall then reproduced it
exactly: four post heads through the awning, like tacks.
Both were pushed proud DELIBERATELY, to keep two faces out of one plane and
away from the z-fight check. That trade is false, and this is the sentence
worth keeping: a piece that must not show ends INSIDE the solid it enters. A
buried face cannot be coplanar with a surface and cannot be seen. Level with
the surface is the only genuinely bad option, and it was the one I kept
treating as the alternative.
- The bench's tenon is now housed an eighth of the seat's thickness below
the top. That is a real joint rather than a compromise: a stub tenon into
the underside of a board is how a bench is made when the top is thick
enough to take it, which at 0.135 of the height it is. What is lost is the
panel of end grain; what is gained is a seat.
- The stall's posts stop ON the cloth's mid surface, with half its thickness
over them, and the cloth went from 0.2 of a board to 0.42 so there is
something to bury them in. The heads now sit 25 mm under the top surface.
And the brief is a check now, because a rule I keep is worth less than a rule
the build keeps. `nothingAbove` names the part nothing else may rise above —
the seat, the counter, the awning — and it reports the offender and the
millimetres. Mutation-tested: pushing the tenon back to 3 mm proud fails it
with "PROUD: legs by 3.0mm".
38 models, all checks pass, 0 floating cases, documentation in step.
CRT
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