State as submitted to IEEE TVCG (TVCG-2026-03-0261) Repository contents corresponding to the manuscript submitted in March 2026, before the major revision. Retained for the record: the original lme4::glmer Gamma fits reported in that version did not converge reliably and were re-estimated with glmmTMB during the revision. -----BEGIN SSH SIGNATURE----- U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgMIyaYKfPmUOums2yhpVCxn6LAL +TdYw1aIZVOFwWRIIAAAADZ2l0AAAAAAAAAAZzaGE1MTIAAABTAAAAC3NzaC1lZDI1NTE5 AAAAQG+zptUKbsucHmzp1FRyIfhQfSiZzxQlU8tydLDlppt0TdvFDYJimeiKRnp55lOngY oEnzdND9Wb3i3UkYXfHwY= -----END SSH SIGNATURE-----