A av m4: reconstructed mesh (GLB)
A single-image 3D reconstruction of head and shoulders portrait of a south asian man in his fifties, written as binary glTF, geometry addressed through an accessor table. Its twin in this group is the same mesh written as the other format, from ONE reconstruction rather than two runs - so the pair tests whether a reader returns the same geometry from two containers with nothing in common. Both hold 28,536 vertices and 57,064 triangles; those counts were read from the GLB's accessor table and by counting lines in the OBJ, by separate code, and a disagreement would have stopped this shipping. It is closed: every edge belongs to exactly two triangles, so there are no holes and no non-manifold edges. The bounding box measures 0.3191 x 1.0247 x 0.8981 units.
Specifications
- Vertices
- 28536
- Triangles
- 57064
- Boundary Edges
- 0
- Non Manifold Edges
- 0
- Container
- GLB
- Role
- pair-member
- Pair Format
- obj
- Model
- TripoSR (MIT), marching cubes at detail 128
- Cutout
- BiRefNet background removal, applied before reconstruction
- Detail
- 128
- Surface Threshold
- 25
- Object Fills
- 0.85
- Source Plate
- nss-a-av-m4_00001_.png
- Bounding Box Extent
- 0.3191 x 1.0247 x 0.8981
- Synthetic
- true
- Disclosure
- Reconstructed from an AI-generated plate. Synthetic geometry, not a scan of a real object.
- Schema Version
- 1
Testing contract
Expected to pass- Scenario
- Load this file and its OBJ twin in the same pair, then compare vertex count, triangle count and bounding box between the two.
- Expected result
- Both report 28,536 vertices and 57,064 triangles over a bounding box of 0.3191 x 1.0247 x 0.8981 units, because they were written from ONE reconstruction rather than two runs. That is the check worth making: a reader that drops vertices, re-triangulates a face or flips an axis still returns a file that loads and still looks like the object, and only a second encoding of the same geometry exposes it. Every edge belongs to exactly two triangles, so the surface is closed: no holes, no non-manifold edges.
What is a .glb file?
GLB is the binary form of glTF, packaging 3D scene geometry, materials, textures, animations, and node hierarchy into a single self-contained file. It is optimized for efficient runtime loading and is often called the JPEG of 3D. It is widely used in web, AR, and real-time 3D applications.
How to use this file
Use an example GLB to test glTF loaders, embedded-texture and animation handling, and real-time rendering pipelines in web or game engines.
How to use this file for testing
“A av m4: reconstructed mesh (GLB)” is a deterministic Novus Examples fixture for Mesh processing QA. Deterministic GLB meshes with known geometry and triangle counts for regression-testing mesh import/export, decimation, repair, and validation pipelines.
Documented properties for this file: pair-member. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such, expect parsers to fail loudly rather than silently accept them.
3D and CAD fixtures carry one small, documented solid or scene. Convert and inspect against the known geometry, units, and structure; format twins let you diff interchange fidelity, and the 3D viewer previews the actual mesh.
Code examples
import trimesh # pip install trimesh
mesh = trimesh.load("a-av-m4.glb")
print(mesh.bounds, mesh.faces.shape)Related files
- glbA av nb1: reconstructed mesh (GLB)A single-image 3D reconstruction of head and shoulders portrait of a young androgynous person with short pink hair, written as binary glTF, geometry addressed through an accessor table. Its twin in this group is the same mesh written as the other format, from ONE reconstruction rather than two runs - so the pair tests whether a reader returns the same geometry from two containers with nothing in common. Both hold 33,734 vertices and 67,464 triangles; those counts were read from the GLB's accessor table and by counting lines in the OBJ, by separate code, and a disagreement would have stopped this shipping. It is closed: every edge belongs to exactly two triangles, so there are no holes and no non-manifold edges. The bounding box measures 0.147 x 1.0309 x 1.0116 units.
- objA av nb1: reconstructed mesh (OBJ)A single-image 3D reconstruction of head and shoulders portrait of a young androgynous person with short pink hair, written as Wavefront text, one `v` line per vertex and one `f` line per face. Its twin in this group is the same mesh written as the other format, from ONE reconstruction rather than two runs - so the pair tests whether a reader returns the same geometry from two containers with nothing in common. Both hold 33,734 vertices and 67,464 triangles; those counts were read from the GLB's accessor table and by counting lines in the OBJ, by separate code, and a disagreement would have stopped this shipping. It is closed: every edge belongs to exactly two triangles, so there are no holes and no non-manifold edges. The bounding box measures 0.147 x 1.0309 x 1.0116 units.
- glbA avatar f2: reconstructed mesh (GLB)A single-image 3D reconstruction of head and shoulders portrait of a young hijabi woman against a plain neutral studio background, written as binary glTF, geometry addressed through an accessor table. Its twin in this group is the same mesh written as the other format, from ONE reconstruction rather than two runs - so the pair tests whether a reader returns the same geometry from two containers with nothing in common. Both hold 29,272 vertices and 58,536 triangles; those counts were read from the GLB's accessor table and by counting lines in the OBJ, by separate code, and a disagreement would have stopped this shipping. It is closed: every edge belongs to exactly two triangles, so there are no holes and no non-manifold edges. The bounding box measures 0.2703 x 1.0417 x 0.9562 units.
- objA avatar f2: reconstructed mesh (OBJ)A single-image 3D reconstruction of head and shoulders portrait of a young hijabi woman against a plain neutral studio background, written as Wavefront text, one `v` line per vertex and one `f` line per face. Its twin in this group is the same mesh written as the other format, from ONE reconstruction rather than two runs - so the pair tests whether a reader returns the same geometry from two containers with nothing in common. Both hold 29,272 vertices and 58,536 triangles; those counts were read from the GLB's accessor table and by counting lines in the OBJ, by separate code, and a disagreement would have stopped this shipping. It is closed: every edge belongs to exactly two triangles, so there are no holes and no non-manifold edges. The bounding box measures 0.2703 x 1.0417 x 0.9562 units.
- glbA avatar m1: reconstructed mesh (GLB)A single-image 3D reconstruction of head and shoulders portrait of a smiling black man against a plain grey studio background, written as binary glTF, geometry addressed through an accessor table. Its twin in this group is the same mesh written as the other format, from ONE reconstruction rather than two runs - so the pair tests whether a reader returns the same geometry from two containers with nothing in common. Both hold 34,562 vertices and 69,120 triangles; those counts were read from the GLB's accessor table and by counting lines in the OBJ, by separate code, and a disagreement would have stopped this shipping. It is closed: every edge belongs to exactly two triangles, so there are no holes and no non-manifold edges. The bounding box measures 0.1821 x 1.032 x 1.0028 units.
- objA avatar m1: reconstructed mesh (OBJ)A single-image 3D reconstruction of head and shoulders portrait of a smiling black man against a plain grey studio background, written as Wavefront text, one `v` line per vertex and one `f` line per face. Its twin in this group is the same mesh written as the other format, from ONE reconstruction rather than two runs - so the pair tests whether a reader returns the same geometry from two containers with nothing in common. Both hold 34,562 vertices and 69,120 triangles; those counts were read from the GLB's accessor table and by counting lines in the OBJ, by separate code, and a disagreement would have stopped this shipping. It is closed: every edge belongs to exactly two triangles, so there are no holes and no non-manifold edges. The bounding box measures 0.1821 x 1.032 x 1.0028 units.
Generated by generation/comfy_tripo_wave.py. Free for any use, no attribution required, license.