Every anatomy body is an independent TRELLIS reconstruction: no shared topology, no vertex
correspondence, its own UV atlas. That kills garment portability — a fitted mesh can't move
between bodies. Reskin sidesteps the whole problem by repainting the atlas the body already
has, so it works on unstructured meshes and needs no rig.
Chain (/api/reskin), all local except one farm call:
render_plates.py -> bind-pose front/back ortho plates, EEVEE, 1024, transparent
mflux_image_edit -> "put <garment> from image 2 onto the person in image 1", per plate
align_plate.py -> re-fit the edited figure to the original bbox. The edit model redraws
at its own scale/offset, and the projection bake assumes the original
framing, so skipping this makes the body sample background.
bake_skin.py -> Cycles DIFFUSE projection onto the mesh's real UVs, front/back split
on normal.Y
Costume swapping in the browser is just a material.map change, so pre-baked outfits toggle
instantly with no re-bake; the bare map is retained so it's reversible.
Fixed a real defect in the inherited baker: planar front/back projection has no idea a head
is round, so side-facing skull polygons sampled whatever front-plate pixel sat at their x/z
and painted a ghost second face down the side of the head (clearly visible on phrtt2). Since
this tier repaints CLOTHES, the bake now keeps the body's own texture above a neck-height
cutoff (default 0.87 of body height, -1 to disable), sampling it through the mesh's real UVs.
Verified end-to-end on phrtt2 (1 mesh / 1 UVMap / 1 material / 4,364 tris — the reskin class):
farm try-on produced a convincing corduroy jacket holding the exact T-pose, and the bake put
it on the model. Known ceiling, unchanged and by design: the silhouette does not move, so this
sells tight and printed garments and reads wrong for a heavy coat.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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