All seven Pixal3D models now load and run. shape_dec 292/292, tex_dec 284/284, both
with zero missing/unmapped/mismatched keys - the 8-param difference between them is
exactly the four to_subdiv layers, since tex_dec has pred_subdiv=False.
Behaviour is right: 12 latent voxels grow SELECTIVELY through four stages
(12 -> 91 -> 193 -> 358 -> 1150) rather than x8 each time, which would have reached
49,152. Scale lands at 1/16. shape_dec emits the hardcoded 7 channels and its vertex
head produces offsets inside the [-0.5, 1.5] band its sigmoid+voxel_margin allows.
tex_dec, guided by shape_dec's masks, reproduces exactly the same voxel count.
VERIFICATION CAVEAT, recorded in the README: these two are the only models using sparse
conv, so upstream cannot run here and there is no numerical oracle. Unlike the five
models verified at correlation 1.0, these are checked structurally and behaviourally
only. Weaker evidence, and labelled as such rather than presented alongside the
verified results.
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