Pith Number

pith:T63HW7LM

pith:2026:T63HW7LMBGUXJNGR5EHMYTFSMX

not attested not anchored not stored refs resolved

A real time lighting technique for procedurally generated 2d isometric game terrains

\'Erick Oliveira Rodrigues, Esteban Clua

Estimating 2D isometric objects as 3D shapes produces real-time 2.5D lighting for procedurally generated game terrains.

arxiv:2605.17666 v1 · 2026-05-17 · cs.GR

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\pithnumber{T63HW7LMBGUXJNGR5EHMYTFSMX}

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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

The proposed lighting system estimates the geometrical shape of the 2D objects as if they were 3D for further light interaction, therefore producing a 2.5D effect.

C2weakest assumption

That opacity maps can reliably correct the visual artifacts created by the 3D shape estimation step while preserving real-time performance across varied hardware.

C3one line summary

A CPU-GPU coupled technique estimates 3D geometry from 2D isometric procedural maps and uses opacity maps to produce real-time 2.5D lighting effects.

References

4 extracted · 4 resolved · 0 Pith anchors

[1] Computational Intelligence Magazine 6, 16-25 (2011) 2011

[2] Computers and Geoscience 27, 77-83 (2001) 2001

[3] In: Game Developers Conference: Advanced OpenGL (2000) 2000

[4] https://github 2013

Receipt and verification

First computed	2026-05-20T00:04:51.697122Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fb67b7d6c09a974b4d1e90ecc4cb265f7cf0fbc16708c393a0ecbda24d0b623

Aliases

arxiv: 2605.17666 · arxiv_version: 2605.17666v1 · doi: 10.48550/arxiv.2605.17666 · pith_short_12: T63HW7LMBGUX · pith_short_16: T63HW7LMBGUXJNGR · pith_short_8: T63HW7LM

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/T63HW7LMBGUXJNGR5EHMYTFSMX \
  | 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: 9fb67b7d6c09a974b4d1e90ecc4cb265f7cf0fbc16708c393a0ecbda24d0b623

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1dcf089aefb2c8d3928678ecae16a1cae7bb36d05907fef5e1fcc2030afdb86f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.GR",
    "submitted_at": "2026-05-17T21:51:51Z",
    "title_canon_sha256": "305d9f1f5ec80b807a87df606e7765e056702d52c13f9c8ab2a1c932cf1df3c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.17666",
    "kind": "arxiv",
    "version": 1
  }
}