Two separate faults. The pattern was wrong, and the scale was broken.
Pattern: the sett is published as K/4 R32 K32 Y/4, the slashes marking
pivots, which reflects out to K4 R32 K32 Y4 K32 R32 — 136 threads, about
half black and half red with a yellow line worth 3%. I had the structure
inverted: the yellow overstripe belongs down the centre of a wide black
band, and the narrow black guard belongs between two red blocks. Mine put
yellow between narrow blacks and the wide black elsewhere, which is why it
read as a generic check rather than as Wallace.
Scale: thread width was a fixed fraction of the screen while the sett grew
from 84 threads to 216, so a repeat became 933dp on a 360dp phone and only
0.39 of one was ever visible. The cloth had zoomed into a few enormous
blocks and stopped being a weave at all — that is the part that got worse,
not the colours. Thread width is now derived from the sett, so a couple of
full repeats are on screen whatever the threadcount says, and changing the
count rescales instead of silently magnifying.
The icon is generated from the same numbers at one repeat across the
adaptive safe zone.
Threadcount cross-checked against two independent sources rather than
guessed; recorded in Tartan.kt and the README so the next change starts
from the published figures.
Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_015qjfMiPUDshdKEUa6vxqzN
Claude
f5a2626196