Halden Mk-IV USD BRep diagnostic comparison

Authored Halden geometry and viewer integration: Sunnyday Technologies.
The owner authorized this bounded public demonstration on 2026-10-14.
The page includes source-hand geometry, saved exact USD and display meshes.
It does not include private evaluator answer-key files or change benchmark scores.
This is an unscored diagnostic. Failed geometry and image checks are retained.
The design is unbuilt; no physical validation is claimed.

Three.js 0.186.0 and OrbitControls are distributed under the MIT license.
The complete license is included at assets/vendor/THREE-LICENSE.txt.
The official minified Three core bytes are served as three.core.js to match
the published module import; the bytes are unchanged. OrbitControls has one
import-specifier change from bare three to the local module. Original and
served vendor hashes and modification details are in the comparison receipt.

NVIDIA USD BRep 1.0.0 / SMLib processed the geometry offline.
The NVIDIA runtime and SDK binaries are not distributed by this site.
NVIDIA USD BRep source is Apache-2.0 with bundled third-party notices:
https://github.com/NVIDIA-Omniverse/usd-brep/tree/v1.0.0
NVIDIA product names are used to identify the software tested; no endorsement
or engineering approval is implied.

The browser uses Three.js and saved meshes. It does not run the exact kernel.
Native geometry failures bar a drop-in replacement claim.