derive() learned the LS-to-HS stride from the control-point term of hull LDS reads, or from the patch term of reads at a computed control-point index. A hull with one input control point reads it at constant offsets, so neither applies and the stride stays unknown ('the hull shader reads no LDS per control point, so the local stride is unknown'). Every hull read already has a patch term of exactly inputControlPoints * localStride, so take the stride from it for reads without a control-point term too. Resident Evil Village's quad patches have one input control point.
Yunus Shaikh
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