The gable wall band tiled its V in segment-local space, so its texture phase
didn't line up with the wall below (whose ExtrudeGeometry UVs map V = 1 -
height-from-base). Make vertical roof faces tile V in world space
(V = 1 - worldY) via the segment's resolved world Y (parent roof + segment
position), so the band matches a ground-floor wall's vertical tiling at the
eave seam. U is unchanged (stays in the face's local run).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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