Pith Number

pith:TSUVO2P2

pith:2026:TSUVO2P2GAAUKWRFYHG67GGPRQ

not attested not anchored not stored refs resolved

Ordered Front-to-back Any-Hit Traversal in RTX

Ingo Wald

Multiple techniques enable ordered front-to-back any-hit traversal on existing RTX ray tracing hardware without skipping intersections.

arxiv:2605.16697 v1 · 2026-05-15 · cs.GR · cs.CG

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\pithnumber{TSUVO2P2GAAUKWRFYHG67GGPRQ}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

We describe multiple different ways of solving this problem within the constraints of the existing ray tracing pipeline, and evaluate the different realizations.

C2weakest assumption

That the existing ray tracing pipeline (such as in RTX) provides enough hooks or flexibility to implement ordered front-to-back any-hit traversal without skipping intersections or violating hardware guarantees.

C3one line summary

Presents and evaluates multiple methods for achieving ordered front-to-back any-hit traversal within the constraints of existing ray tracing pipelines.

References

18 extracted · 18 resolved · 0 Pith anchors

[1] Gribble, Johannes Guenther, and Ingo Wald

[2] An Evaluation of Multi-Hit Ray Traversal in a BVH Using Existing First-Hit / Any-Hit Kernels.Journal of Computer Graphics Techniques4, 4 (2015) 2015

[3] Apple. 2026. Metal Shading Language Specification - Version 4. https://developer.apple.com/metal/Metal-Shading-Language-Specification.pdf 2026

[4] Butler and Abe Stephens 2007

[5] Christiaan Gribble, Alexis Naveros, and Ethan Kerzner. 2014. Multi-Hit Ray Traversal.Journal of Computer Graphics Techniques (JCGT)3, 1 (2014) 2014

Receipt and verification

First computed	2026-05-20T00:02:37.116530Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ca95769fa3001455a25c1cdef98cf8c37090abd773ef8115ba8e95522563a03

Aliases

arxiv: 2605.16697 · arxiv_version: 2605.16697v1 · doi: 10.48550/arxiv.2605.16697 · pith_short_12: TSUVO2P2GAAU · pith_short_16: TSUVO2P2GAAUKWRF · pith_short_8: TSUVO2P2

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Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/TSUVO2P2GAAUKWRFYHG67GGPRQ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 9ca95769fa3001455a25c1cdef98cf8c37090abd773ef8115ba8e95522563a03

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2911a9ee5032458ebcb7a1bd4d0d5ab7da9842c13fd2a2148fd8ca4be8b97e1b",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.GR",
    "submitted_at": "2026-05-15T23:21:04Z",
    "title_canon_sha256": "7f0934eeab2801e22d77f1ca87b38940dc332a7889dd55f76c14faca5c56d85f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.16697",
    "kind": "arxiv",
    "version": 1
  }
}