x rotations without uvlock already sampled the model-space element like
vanilla (lying logs/pillars, vertical observers/dispensers verified against
FaceBakery for every blockstate variant). The remaining divergence was
uvlock: faces kept model-extent UVs and were sampled in world orientation,
so top stairs, ceiling buttons, fences/walls and ceiling vines showed
shifted or rotated textures. Rotated uvlocked elements now also go through
the model-space path, with each face's final UVs mapped by vanilla's
BlockMath face transformation (inverted, as in FaceBakery).
Zero-thickness elements (vine, lichen) always reported their low face;
pick the face turned towards the ray instead.
Edge-case test plugin: xrot/xrot2 scenes (lying pillars, vertical
observers/dispensers/droppers, top stairs, ceiling buttons).
MineTec
a0b7ec3a90