README.md

metadata

license: other
license_name: mixed-cc0-mit
license_link: https://huggingface.co/datasets/gerchowl/mat-vis/blob/main/LICENSES/README.md
pretty_name: mat-vis — PBR material catalog
task_categories:
  - image-to-image
  - image-classification
tags:
  - pbr
  - materials
  - textures
  - graphics
  - 3d
  - rendering
  - mtlx
  - materialx
size_categories:
  - 1K<n<10K

mat-vis — PBR material catalog

Open, browseable catalog of physically-based rendering (PBR) materials aggregated from four upstream sources. Served as atomic, immutable tagged revisions with tar containers + JSON sidecar offset maps for channel-level HTTP range reads.

• Canonical client: mat-vis-client (PyPI) — pins a single dataset revision per release.
• Source repo / baker: github.com/MorePET/mat-vis
• Schema source-of-truth: docs/specs/index-schema.json
• Architecture: ADR-0007 — Substrate move to HF Datasets + tar container

Sources and licenses

Source	Upstream	License	Attribution
ambientcg	https://ambientcg.com	CC0-1.0	Public-domain dedication
polyhaven	https://polyhaven.com	CC0-1.0	Public-domain dedication
physicallybased	https://physicallybased.info	CC0-1.0	Public-domain dedication
gpuopen	https://matlib.gpuopen.com	MIT	© 2022 Advanced Micro Devices, Inc. — see LICENSES/AMD-NOTICE.txt

Full license texts live in LICENSES/. When redistributing gpuopen-derived material data, preserve the AMD attribution.

Layout per tagged revision

v2026.05.0/
  release-manifest.json           # {tier: {source: {tar_url, rowmap_url, materials_count}}}
  ambientcg.json                  # per-source catalog: id, category, scalars, source_url
  polyhaven.json
  gpuopen.json
  physicallybased.json
  ambientcg-1k.tar                # one tar per (source, tier)
  ambientcg-1k-rowmap.json        # {material_id: {channel: {offset, length}}}
  polyhaven-1k.tar + polyhaven-1k-rowmap.json
  …
  ktx2/<source>-<tier>.tar + ktx2/<source>-<tier>-rowmap.json
  <source>-mtlx.json              # MaterialX graph index (gpuopen, polyhaven, ambientcg)

Every revision is an atomic Hugging Face commit — manifest + tars + rowmaps + index land together or not at all.

Accessing data

Python client (recommended)

uv add mat-vis-client

from mat_vis_client import Client

client = Client()              # pins a revision compatible with this client version
png_bytes = client.fetch("ambientcg", "Bricks080", channel="diffuse", tier="1k")

Direct HTTP range reads

base = https://huggingface.co/datasets/gerchowl/mat-vis/resolve/<revision>/
manifest = base + "release-manifest.json"
rowmap   = base + "ambientcg-1k-rowmap.json"
# offset,length from rowmap[<material_id>][<channel>]
# Range: bytes=<offset>-<offset+length-1> against base + "ambientcg-1k.tar"

Versioning

• Dataset revisions: calver — v2026.05.0, v2026.06.0, …
• Client version: semver — mat-vis-client 0.5.x targets HF substrate; 0.4.x still works against the frozen v2026.04.0 GitHub Release.

Contact

Issues, bugs, and feedback: https://github.com/MorePET/mat-vis/issues