Actual NVIDIA engine output

Halden Mk-IV

The same authored STEP. Two geometry engines. One viewer.

Opening the authored hand…

OCP · AUTHORED STEP59 groups / 120 solids

Drag to orbit · pinch to zoom · tap a part

OCP tessellation of the original authored STEP. Three.js renders this display mesh.

Verifying saved display assets…

NVIDIA USD BRep / SMLib produced the comparison geometry offline. The phone renders the saved mesh; the exact kernel is not running in this browser.

Inspect a component

Selected part opacity100%

Fade other parts to reveal this oneWireframe display

Individual movement

Loading motion from the matching CAD source revision.

Recorded engineering checks apply to the frozen Rest source. Sliders change the browser display and never rerun CADCLAW collision checks. No physics or tendon drive is simulated.

Earlier Windows core profile

HISTORICAL · CONTENTION AFFECTED

Earlier OCP observations

Operation	Before	After

These older Windows counters recorded attempts only. The later GX10 checks use corrected completion accounting. No cross-machine speed ratio is implied.

Historical core receipt

What is qualified?

The original STEP source was bound to the retained hand geometry. Both routes use all 59 source groups and 120 solids. This unscored exhibit includes the verified 49 rigid benchmark groups plus 10 flexible groups.

Exact NVIDIA BRep retained the solid counts and closely matched bounds. Finite surface samples agree closely in both directions. Mass parity failed for 47 groups, and the palm shell tessellation is nonmanifold. Passing a schema check does not resolve these failures.

No mechanical or physical validation and no MARB score is produced here.

Earlier Windows engine observation

One Windows CPU observation. NVIDIA did not demonstrate a speed win on this hand. Both use nominal 0.1 mm / 15° tessellation settings; these do not establish equivalent mesh error guarantees. The viewer retains this run's meshes; the GX10 panel reports separate ARM processing.

Operation	OCP	NVIDIA route
Cached native geometry import	0.237 s	0.250 s
Tessellation kernel	2.580 s	20.410 s
Display triangles	82,646	29,196 after Earcut

Original STEP / XCAF import: 3.151 s. Additional native BRep → NVIDIA exact USD conversion: 8.421 s across 59 converter processes. Cached OCP reads of 59 separate group files: 0.413 s. Conversion, setup and validation costs are separate from cached reads.

No GPU speedup, model-token saving or controlled statistical benchmark is established.

What controls each feature?

Feature	Owner
Shape, solids, Rest placement	Authored STEP and its matching CAD source revision
Baseline mesh	OpenCascade / OCP
Exact BRep USD representation and comparison mesh	NVIDIA OCCT bridge and SMLib, offline
59 named occurrences, units and metadata	CADCLAW research adapter using OpenUSD scene metadata
Orbit, zoom, lighting, rasterization	Three.js / OrbitControls
Selection, palette, opacity, reveal, wireframe	This JavaScript viewer
Illustrative motion	JavaScript rigid transforms from matched CAD axes and source controller deltas
Assembly, interference and engineering checks	CADCLAW / OCP offline checks at frozen Rest; moving sliders does not run them
Benchmark scoring	MARB evaluator; not running here

Neither USD nor a viewer control automatically creates joints, actuator limits, material density or robot dynamics. Display colors are an inspection palette, not source CAD material specifications.

Files and provenance

Source STEP SHA-256

356ed1fd967696bd9bf9393260950db2556649fd867ea5f52cf81e381721e64d

Display assets are verified on load.

Exact USD contains 59 named BrepArray prims, millimeter units and Z-up. This file is exact representation evidence, not engineering approval.

Rights and third-party notices

Comparison receipt Native exact USD

Three.js MIT license · NVIDIA USD BRep 1.0.0 · Known issues