Datasets:

Splataverse
/

cv-classic

---
pretty_name: CV-classic
license: other
license_name: cv-classic-source-terms
license_link: https://huggingface.co/datasets/Splataverse/cv-classic/blob/main/LICENSES.md
language:
- en
tags:
- 3d
- gaussian-splatting
- computer-graphics
- pbr
- mesh
---
# CV-classic

![CV-classic: actual balanced Gaussian renders of all 27 reference objects](figures/contact_sheet_all.png)

Studio-lit renders of the actual balanced PLYs. The [initial eleven-object sheet](figures/contact_sheet.png) ([SVG](figures/contact_sheet.svg), [PDF](figures/contact_sheet.pdf)), [teaser assets](figures/teaser_strip.png), [per-object previews](previews/), [additional textured previews](expansion_previews/) and [normal layers](expansion_normals/) are also available. Geometry-only meshes use declared reference materials; previews do not implement refractive transport.

Classic graphics and vision meshes converted to 3D Gaussian splats, with **balanced and uncapped CPU exports**, float32 PBR attributes and source-face/barycentric provenance. Every object starts from actual mesh geometry; no image-only capture or learned mesh reconstruction is substituted.

**This dataset contains derived Gaussian splats and sidecars only.** Source meshes, textures and source archives are not hosted here; each object links to where its source can be downloaded, with its license and attribution ([LICENSES.md](LICENSES.md), `source_access` in [manifest.json](manifest.json)).

This dataset is **public with manual access approval**. Request access here, then authenticate with your approved Hugging Face account.

**Release status: 27/27 objects uploaded and remotely verified.**

| Object | Balanced Gaussians | Uncapped Gaussians | Material origin |
|---|---:|---:|---|
| Utah Teapot | 65,684 | 478,044 | assigned_reference_material |
| Utah Teacup | 111,760 | 876,134 | assigned_reference_material |
| Utah Teaspoon | 32,768 | 109,958 | assigned_reference_material |
| Stanford Bunny | 72,570 | 800,803 | assigned_reference_material |
| Stanford Armadillo | 101,422 | 667,495 | assigned_reference_material |
| NeRF Lego Bulldozer | 2,100,190 | 5,241,362 | original_blender_shader_graphs |
| DamagedHelmet | 7,933,955 | 26,633,262 | authored_gltf_pbr |
| FlightHelmet | 11,034,440 | 48,455,785 | authored_gltf_pbr |
| Blender Suzanne | 31,954 | 453,528 | assigned_reference_material |
| Stanford Dragon | 871,246 | 1,198,208 | assigned_reference_material |
| Stanford Happy Buddha | 1,087,375 | 1,288,964 | assigned_reference_material |
| AntiqueCamera | 4,162,686 | 24,175,406 | authored_gltf_pbr |
| BoomBox | 2,326,908 | 10,684,929 | authored_gltf_pbr |
| Avocado | 36,586 | 12,577,514 | authored_gltf_pbr |
| ToyCar | 1,548,612 | 7,141,962 | authored_gltf_pbr |
| Duck | 129,482 | 1,983,970 | authored_gltf_pbr |
| YCB Mustard Bottle | 1,042,180 | 54,183,035 | authored_diffuse_texture_reference_roughness |
| YCB Tomato Soup Can | 2,425,745 | 39,534,867 | authored_diffuse_texture_reference_roughness |
| YCB Cracker Box | 5,683,981 | 44,463,205 | authored_diffuse_texture_reference_roughness |
| YCB Banana | 84,652 | 32,226,661 | authored_diffuse_texture_reference_roughness |
| YCB Power Drill | 882,197 | 25,010,955 | authored_diffuse_texture_reference_roughness |
| NeRF Hotdog | 259,515 | 20,918,717 | original_blender_shader_graphs |
| NeRF Materials | 1,375,512 | 1,925,487 | original_blender_shader_graphs |
| NeRF Chair | 964,782 | 3,415,059 | original_blender_shader_graphs |
| NeRF Mic | 802,161 | 1,072,223 | original_blender_shader_graphs |
| NeRF Drums † | 3,127,825 | 61,913,631 | original_blender_shader_graphs |
| NeRF Ficus † | 30,334,566 | 33,508,582 | original_blender_shader_graphs |
## Download
```bash
pip install -U huggingface_hub tyro
hf auth login
hf download Splataverse/cv-classic download_classic.py --repo-type dataset --local-dir cv-classic-tools
python cv-classic-tools/download_classic.py --asset stanford_bunny --profile balanced --output-dir ./CV-classic
```
Use `--profile uncapped` for the other export. `--include-source` prints the original source URL, license and attribution and saves them as `source.json`; it does not download the source, which you fetch from the upstream under its own terms. Each PLY and sidecar is independently SHA256-checked. Files are organized as source/object/object_b.ply (balanced) and source/object/object.ply (uncapped), each with `.provenance.json` and `.validation.json`, plus per-object `materials.json` and `asset.json`. The manifest records exact file paths, SHA256 identities, profile counts, source URLs, licenses and material origin. These reference objects have no train/validation/test assignment.

## Profiles and material scope

**Balanced** uses the analytical CPU source-error recipe `analytical_source_error_v1` (isotropic Gaussians): geometry resolution 128, sampled source mip-band RMS tolerance 0.03, one plan and one emission. No rendering, iterative count search or learned estimation is used.

**Uncapped** (`uncapped_source_pbr_geometry512_v1`) has no Gaussian-count budget. It samples all available native core-PBR material texel scales plus a source-extent/512 geometry-spacing floor. Geometry-only objects have no native texture resolution, so their declared geometry-spacing rule determines density.

Binary PLYs contain standard 3DGS positions, log radii, wxyz quaternion, logit opacity (0.99; glTF BLEND materials scale it by material alpha and MASK samples below alphaCutoff are dropped) and SH-DC display colour, plus linear base colour, roughness, metallic, AO, linear/HDR emission, world shading normal (interpolated from the authored source vertex normals, face normal where a primitive has none), material alpha, primitive/material/source-face IDs, UVs and barycentrics. Available constant transmission/IOR/specular/clearcoat parameters are also exported. Native glTF material JSON is kept in `materials.json`; Blender shader graphs and preparation steps are recorded in each `.provenance.json`.

The Utah tea set, Stanford geometry-only scans and Suzanne receive **explicitly assigned reference materials**, rather than invented measured PBR. The Lego scene's pre-Principled Diffuse/Glossy/Glass shaders have a declared core-PBR projection using source parameters; exact native procedural-BSDF equivalence is not claimed. The other NeRF-synthetic scenes (NeRF Chair, NeRF Drums, NeRF Ficus, NeRF Hotdog, NeRF Materials, NeRF Mic) are exported from the same mirrored Blender files: collection instances are realized, Principled materials keep their shader with image-driven Mix/ColorRamp chains baked to plain textures and procedural bump-height chains dropped, and pre-Principled graphs are reduced to weighted BSDF lobes and projected onto core PBR (core_pbr_projection_v2; view-dependent mix factors use a declared facing-averaged weight). For Drums and Ficus, legacy MixRGB blend modes are evaluated as Blender defines them and an image-driven legacy colour chain (e.g. the red overlay on the drum-shell wood texture) is baked per texel, with its mean matched to the projected constant. Every operation and approximation is recorded per material in provenance. NeRF-synthetic Ship is not included because no downloadable source was found. Khronos materials retain their authored glTF PBR channels and optical parameters.
**† Spacing-floored recipe (NeRF Drums and NeRF Ficus only).** Their source textures are mapped at full resolution onto tiny parts (drum hardware, ficus leaves), so the standard recipes would plan about 141M/162M (Drums) and 408M/2.27B (Ficus) balanced/uncapped Gaussians. These two objects instead use `analytical_source_error_v1_minspacing4096_edge2_aniso4` (balanced) and `uncapped_source_pbr_geometry512_v1_minspacing4096_edge2_aniso4` (uncapped): the same analysis, but no sample spacing is finer than the object's largest extent / 4096 (`_minspacing4096`), sliver faces (thin tubes and rims) get up to 2x finer lattices along their long edge (`_edge2`), and Gaussians follow their lattice cell shape with an anisotropy cap of 4 (`_aniso4`). **Their "uncapped" export is therefore spacing-floored, not texel-complete.** Every other object keeps its original isotropic recipe; the recipe of each export is recorded in its `.provenance.json` and in manifest.json.
Every published PLY passes binary readback checks, float32 property preservation and source-face/barycentric position reconstruction against the source geometry at conversion time. These are structural/material-transfer checks, **not a rendered LPIPS guarantee**. Rendering and relighting evaluation remain separate from conversion. `source_face_id` indexes the triangles of the source mesh as prepared by the published implementation (`implementation/`); the provenance files record the prepared-mesh and source-geometry SHA256 so a locally rebuilt `source_geometry.npz` can be checked. That geometry is not hosted here.

## Attribution and reuse

YCB objects transfer their provided diffuse textures. Their roughness 1 and metallic 0 are explicitly assigned reference parameters, rather than measured material channels. Toy Car also transfers authored clearcoat texture and sheen parameters; the qualitative preview shader uses core PBR lighting.

Each asset retains its original terms and credits, which also apply to the derived splats. The collection has **no blanket commercial-use license**: Stanford research terms, the Lego creator's noncommercial attribution terms, FreeGLUT notices and the Khronos assets' individual terms are documented in [LICENSES.md](LICENSES.md). Manual access approval does not replace those terms.

Part of [Splataverse](https://huggingface.co/datasets/maxwildersmith/splataverse).

	---
	pretty_name: CV-classic
	license: other
	license_name: cv-classic-source-terms
	license_link: https://huggingface.co/datasets/Splataverse/cv-classic/blob/main/LICENSES.md
	language:
	- en
	tags:
	- 3d
	- gaussian-splatting
	- computer-graphics
	- pbr
	- mesh
	---

	# CV-classic

	![CV-classic: actual balanced Gaussian renders of all 27 reference objects](figures/contact_sheet_all.png)

	Studio-lit renders of the actual balanced PLYs. The [initial eleven-object sheet](figures/contact_sheet.png) ([SVG](figures/contact_sheet.svg), [PDF](figures/contact_sheet.pdf)), [teaser assets](figures/teaser_strip.png), [per-object previews](previews/), [additional textured previews](expansion_previews/) and [normal layers](expansion_normals/) are also available. Geometry-only meshes use declared reference materials; previews do not implement refractive transport.

	Classic graphics and vision meshes converted to 3D Gaussian splats, with balanced and uncapped CPU exports, float32 PBR attributes and source-face/barycentric provenance. Every object starts from actual mesh geometry; no image-only capture or learned mesh reconstruction is substituted.

	This dataset contains derived Gaussian splats and sidecars only. Source meshes, textures and source archives are not hosted here; each object links to where its source can be downloaded, with its license and attribution ([LICENSES.md](LICENSES.md), `source_access` in [manifest.json](manifest.json)).

	This dataset is public with manual access approval. Request access here, then authenticate with your approved Hugging Face account.

	Release status: 27/27 objects uploaded and remotely verified.

	\| Object \| Balanced Gaussians \| Uncapped Gaussians \| Material origin \|
	\|---\|---:\|---:\|---\|
	\| Utah Teapot \| 65,684 \| 478,044 \| assigned_reference_material \|
	\| Utah Teacup \| 111,760 \| 876,134 \| assigned_reference_material \|
	\| Utah Teaspoon \| 32,768 \| 109,958 \| assigned_reference_material \|
	\| Stanford Bunny \| 72,570 \| 800,803 \| assigned_reference_material \|
	\| Stanford Armadillo \| 101,422 \| 667,495 \| assigned_reference_material \|
	\| NeRF Lego Bulldozer \| 2,100,190 \| 5,241,362 \| original_blender_shader_graphs \|
	\| DamagedHelmet \| 7,933,955 \| 26,633,262 \| authored_gltf_pbr \|
	\| FlightHelmet \| 11,034,440 \| 48,455,785 \| authored_gltf_pbr \|
	\| Blender Suzanne \| 31,954 \| 453,528 \| assigned_reference_material \|
	\| Stanford Dragon \| 871,246 \| 1,198,208 \| assigned_reference_material \|
	\| Stanford Happy Buddha \| 1,087,375 \| 1,288,964 \| assigned_reference_material \|
	\| AntiqueCamera \| 4,162,686 \| 24,175,406 \| authored_gltf_pbr \|
	\| BoomBox \| 2,326,908 \| 10,684,929 \| authored_gltf_pbr \|
	\| Avocado \| 36,586 \| 12,577,514 \| authored_gltf_pbr \|
	\| ToyCar \| 1,548,612 \| 7,141,962 \| authored_gltf_pbr \|
	\| Duck \| 129,482 \| 1,983,970 \| authored_gltf_pbr \|
	\| YCB Mustard Bottle \| 1,042,180 \| 54,183,035 \| authored_diffuse_texture_reference_roughness \|
	\| YCB Tomato Soup Can \| 2,425,745 \| 39,534,867 \| authored_diffuse_texture_reference_roughness \|
	\| YCB Cracker Box \| 5,683,981 \| 44,463,205 \| authored_diffuse_texture_reference_roughness \|
	\| YCB Banana \| 84,652 \| 32,226,661 \| authored_diffuse_texture_reference_roughness \|
	\| YCB Power Drill \| 882,197 \| 25,010,955 \| authored_diffuse_texture_reference_roughness \|
	\| NeRF Hotdog \| 259,515 \| 20,918,717 \| original_blender_shader_graphs \|
	\| NeRF Materials \| 1,375,512 \| 1,925,487 \| original_blender_shader_graphs \|
	\| NeRF Chair \| 964,782 \| 3,415,059 \| original_blender_shader_graphs \|
	\| NeRF Mic \| 802,161 \| 1,072,223 \| original_blender_shader_graphs \|
	\| NeRF Drums † \| 3,127,825 \| 61,913,631 \| original_blender_shader_graphs \|
	\| NeRF Ficus † \| 30,334,566 \| 33,508,582 \| original_blender_shader_graphs \|

	## Download

	```bash
	pip install -U huggingface_hub tyro
	hf auth login
	hf download Splataverse/cv-classic download_classic.py --repo-type dataset --local-dir cv-classic-tools
	python cv-classic-tools/download_classic.py --asset stanford_bunny --profile balanced --output-dir ./CV-classic
	```

	Use `--profile uncapped` for the other export. `--include-source` prints the original source URL, license and attribution and saves them as `source.json`; it does not download the source, which you fetch from the upstream under its own terms. Each PLY and sidecar is independently SHA256-checked. Files are organized as source/object/object_b.ply (balanced) and source/object/object.ply (uncapped), each with `.provenance.json` and `.validation.json`, plus per-object `materials.json` and `asset.json`. The manifest records exact file paths, SHA256 identities, profile counts, source URLs, licenses and material origin. These reference objects have no train/validation/test assignment.

	## Profiles and material scope

	Balanced uses the analytical CPU source-error recipe `analytical_source_error_v1` (isotropic Gaussians): geometry resolution 128, sampled source mip-band RMS tolerance 0.03, one plan and one emission. No rendering, iterative count search or learned estimation is used.

	Uncapped (`uncapped_source_pbr_geometry512_v1`) has no Gaussian-count budget. It samples all available native core-PBR material texel scales plus a source-extent/512 geometry-spacing floor. Geometry-only objects have no native texture resolution, so their declared geometry-spacing rule determines density.

	Binary PLYs contain standard 3DGS positions, log radii, wxyz quaternion, logit opacity (0.99; glTF BLEND materials scale it by material alpha and MASK samples below alphaCutoff are dropped) and SH-DC display colour, plus linear base colour, roughness, metallic, AO, linear/HDR emission, world shading normal (interpolated from the authored source vertex normals, face normal where a primitive has none), material alpha, primitive/material/source-face IDs, UVs and barycentrics. Available constant transmission/IOR/specular/clearcoat parameters are also exported. Native glTF material JSON is kept in `materials.json`; Blender shader graphs and preparation steps are recorded in each `.provenance.json`.

	The Utah tea set, Stanford geometry-only scans and Suzanne receive explicitly assigned reference materials, rather than invented measured PBR. The Lego scene's pre-Principled Diffuse/Glossy/Glass shaders have a declared core-PBR projection using source parameters; exact native procedural-BSDF equivalence is not claimed. The other NeRF-synthetic scenes (NeRF Chair, NeRF Drums, NeRF Ficus, NeRF Hotdog, NeRF Materials, NeRF Mic) are exported from the same mirrored Blender files: collection instances are realized, Principled materials keep their shader with image-driven Mix/ColorRamp chains baked to plain textures and procedural bump-height chains dropped, and pre-Principled graphs are reduced to weighted BSDF lobes and projected onto core PBR (core_pbr_projection_v2; view-dependent mix factors use a declared facing-averaged weight). For Drums and Ficus, legacy MixRGB blend modes are evaluated as Blender defines them and an image-driven legacy colour chain (e.g. the red overlay on the drum-shell wood texture) is baked per texel, with its mean matched to the projected constant. Every operation and approximation is recorded per material in provenance. NeRF-synthetic Ship is not included because no downloadable source was found. Khronos materials retain their authored glTF PBR channels and optical parameters.

	† Spacing-floored recipe (NeRF Drums and NeRF Ficus only). Their source textures are mapped at full resolution onto tiny parts (drum hardware, ficus leaves), so the standard recipes would plan about 141M/162M (Drums) and 408M/2.27B (Ficus) balanced/uncapped Gaussians. These two objects instead use `analytical_source_error_v1_minspacing4096_edge2_aniso4` (balanced) and `uncapped_source_pbr_geometry512_v1_minspacing4096_edge2_aniso4` (uncapped): the same analysis, but no sample spacing is finer than the object's largest extent / 4096 (`_minspacing4096`), sliver faces (thin tubes and rims) get up to 2x finer lattices along their long edge (`_edge2`), and Gaussians follow their lattice cell shape with an anisotropy cap of 4 (`_aniso4`). Their "uncapped" export is therefore spacing-floored, not texel-complete. Every other object keeps its original isotropic recipe; the recipe of each export is recorded in its `.provenance.json` and in manifest.json.

	Every published PLY passes binary readback checks, float32 property preservation and source-face/barycentric position reconstruction against the source geometry at conversion time. These are structural/material-transfer checks, not a rendered LPIPS guarantee. Rendering and relighting evaluation remain separate from conversion. `source_face_id` indexes the triangles of the source mesh as prepared by the published implementation (`implementation/`); the provenance files record the prepared-mesh and source-geometry SHA256 so a locally rebuilt `source_geometry.npz` can be checked. That geometry is not hosted here.

	## Attribution and reuse

	YCB objects transfer their provided diffuse textures. Their roughness 1 and metallic 0 are explicitly assigned reference parameters, rather than measured material channels. Toy Car also transfers authored clearcoat texture and sheen parameters; the qualitative preview shader uses core PBR lighting.

	Each asset retains its original terms and credits, which also apply to the derived splats. The collection has no blanket commercial-use license: Stanford research terms, the Lego creator's noncommercial attribution terms, FreeGLUT notices and the Khronos assets' individual terms are documented in [LICENSES.md](LICENSES.md). Manual access approval does not replace those terms.

	Part of [Splataverse](https://huggingface.co/datasets/maxwildersmith/splataverse).