Smooth blob (icosphere with ripple)

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

Ground-truth mesh

Drag to orbit, scroll to zoom. Rendered from gt/mesh.obj (1280 faces).

Ground-truth views

lighting: studio warm_key low_key

channel: colour depth normals

Why this sample is in the benchmark

The control case. A smooth, convex, low-frequency surface is where any reasonable method should be near-perfect; a failure here means the pipeline (poses, scale, convergence) is broken, not the method.

Baseline sanity check for the whole harness.

Ground truth

GT type

exact

licence

Generated locally -- no third-party licence

source

Procedural (exact GT, offline)

builder

sphere_blob {'subdivisions': 3}

faces

1280

vertices

642

watertight

True

surface area

3.1354 m²

extents (m)

[1.0, 1.0, 1.0]

GT points

20000 surface samples

views

12 × 128px (orbit, fov 45°)

lighting

studio, warm_key, low_key

Acquisition plan

kind local, automatic True, estimated size 3.24 MiB

1. Build geometry 'sphere_blob' with {'subdivisions': 3}
2. Render 12 views (orbit @ 128px, fov 45 deg)
3. Shade under lighting: studio, warm_key, low_key
4. Write GT mesh, surface points, depth, normals, poses

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

Comparisons