Torus ring (genus 1, glossy)

obj_torus_ring · Procedural (exact GT, offline) · generated locally with exact ground truth

Ground-truth mesh

Drag to orbit, scroll to zoom. Rendered from gt/mesh.obj (3136 faces).

Ground-truth views

lighting: studio tri_env top_down

channel: colour depth normals

Why this sample is in the benchmark

A hole in the mesh breaks naive meshing and voxelisation (the hole gets sealed), and the glossy response tempts an optimiser to explain pixels with shading rather than geometry. Tests topological correctness.

Ground truth

GT type

exact

licence

Generated locally -- no third-party licence

source

Procedural (exact GT, offline)

builder

torus_ring {'major': 0.4, 'minor': 0.13}

faces

3136

vertices

1568

watertight

True

surface area

2.0459 m²

extents (m)

[1.06, 1.06, 0.26]

GT points

20000 surface samples

views

12 × 128px (orbit, fov 45°)

lighting

studio, tri_env, top_down

Acquisition plan

kind local, automatic True, estimated size 3.24 MiB

1. Build geometry 'torus_ring' with {'major': 0.4, 'minor': 0.13}
2. Render 12 views (orbit @ 128px, fov 45 deg)
3. Shade under lighting: studio, tri_env, top_down
4. Write GT mesh, surface points, depth, normals, poses

Fully offline. Ground truth is exact (no SfM, no scan noise).

Comparisons