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configs:
- config_name: default
data_files:
- split: test
path: data_bench_v1/test-*
- split: real_photo
path: real_photo/0000.parquet
---
# Material Replacement Bench v1.0
Frozen evaluation split for the interior-design material-replacement
benchmark: 1421 task specs (mask-aligned, watermark-free), of which
1093 are `gt_clean` (the stored `output` edits only the mask and
matches the reference; the rest keep `output` as a non-exemplar reference
solution only).
Task: given `input` + `mask` + `reference` (or the mask-free `instruction`),
replace the masked object's material and change nothing else. Evaluation is
reference-free — outputs are scored on material correctness, outside-mask
preservation, geometry preservation, and lighting harmony, never on pixel
similarity to `output`.
Columns: `instruction` (rewritten, image-faithful), `material_category`,
`surface_type`, `mask_target_seen`, `mask_coverage`, `coverage_bucket`,
`gt_clean`, plus the four images.
Provenance: fully synthetic quadruples generated with OpenAI image models
via codex; curated from `Elfsong/vinhome_material_replacement` (algorithmic
QC + VLM semantic QC + instruction relabeling; see `curation/` there).
Frozen 2026-07-20. Research use.
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