The everything-on job failed the gate at IoU 0.660 on geometry that measures 0.956.
Cause: o_voxel's to_glb applies _BLENDER_ROT on export, (x,y,z) -> (x, z, -y), which
is EXACTLY the inverse of to_camera_frame. So the vertex baker and the UV baker were
returning meshes in different frames and the gate double-rotated the UV one.
Verified numerically: OV == _BLENDER_ROT, and OV @ _BLENDER_ROT.T == I.
to_glb now un-rotates back into the voxel-grid frame and returns a Trimesh, so every
path in mesh.py speaks one frame. After the fix the baked mesh measures IoU 0.883 --
identical to its input -- with bounds matching to 3dp.
That is the THIRD frame bug this session (mesh vertices vs ProjGrid's rotated lattice;
marching_cubes' voxel-index space; now o_voxel's export rotation). None of them throw:
each produces a plausible object that renders fine and silhouettes wrong. The gate
caught all three, which is the argument for having it.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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