{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:K3725CZ5VFV6H75PUVF7REDB7X","short_pith_number":"pith:K3725CZ5","canonical_record":{"source":{"id":"1311.0955","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2013-11-05T03:25:38Z","cross_cats_sorted":[],"title_canon_sha256":"11e90cccf4c13929e39e3c8aeaff7bd4cb77643b0372a75385fc8ad5a3788fa3","abstract_canon_sha256":"5f9836c6a96cc317fbc7a1c88a98e660ea7ab11dc1e534c4fce83eadc2191061"},"schema_version":"1.0"},"canonical_sha256":"56ffae8b3da96be3ffafa54bf89061fdce187060e3fc5de7f3a3d75bd047e519","source":{"kind":"arxiv","id":"1311.0955","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.0955","created_at":"2026-07-05T02:16:09Z"},{"alias_kind":"arxiv_version","alias_value":"1311.0955v2","created_at":"2026-07-05T02:16:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.0955","created_at":"2026-07-05T02:16:09Z"},{"alias_kind":"pith_short_12","alias_value":"K3725CZ5VFV6","created_at":"2026-07-05T02:16:09Z"},{"alias_kind":"pith_short_16","alias_value":"K3725CZ5VFV6H75P","created_at":"2026-07-05T02:16:09Z"},{"alias_kind":"pith_short_8","alias_value":"K3725CZ5","created_at":"2026-07-05T02:16:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:K3725CZ5VFV6H75PUVF7REDB7X","target":"record","payload":{"canonical_record":{"source":{"id":"1311.0955","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2013-11-05T03:25:38Z","cross_cats_sorted":[],"title_canon_sha256":"11e90cccf4c13929e39e3c8aeaff7bd4cb77643b0372a75385fc8ad5a3788fa3","abstract_canon_sha256":"5f9836c6a96cc317fbc7a1c88a98e660ea7ab11dc1e534c4fce83eadc2191061"},"schema_version":"1.0"},"canonical_sha256":"56ffae8b3da96be3ffafa54bf89061fdce187060e3fc5de7f3a3d75bd047e519","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:16:09.926630Z","signature_b64":"eCjF3o5SJ/vbm38xdXAfpv+9Z2gADKt+/D1U2IqsYzvxEND/KbDP5FQjQrnUrG0QXTgJqD9AdeeBxISjPVPNBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"56ffae8b3da96be3ffafa54bf89061fdce187060e3fc5de7f3a3d75bd047e519","last_reissued_at":"2026-07-05T02:16:09.926129Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:16:09.926129Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.0955","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:16:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ns1PF/aWU2kag6ANmRxRt7SdFLlKvPS7CatX+OMro73XpwvYgF1cALnAegCtEGqmP5J+hViJJVjH9djrPJAXBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:48:32.830557Z"},"content_sha256":"67b2e9071e1d3de8c74222d1eb0a4bc50218bb0781da0cb315f1aca8cbbc652a","schema_version":"1.0","event_id":"sha256:67b2e9071e1d3de8c74222d1eb0a4bc50218bb0781da0cb315f1aca8cbbc652a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:K3725CZ5VFV6H75PUVF7REDB7X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Dual-Beam Method-of-Images 3D Searchlight BSSRDF","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.GR","authors_text":"Eugene d'Eon","submitted_at":"2013-11-05T03:25:38Z","abstract_excerpt":"We present a novel BSSRDF for rendering translucent materials. Angular effects lacking in previous BSSRDF models are incorporated by using a dual-beam formulation. We employ a Placzek's Lemma interpretation of the method of images and discard diffusion theory. Instead, we derive a plane-parallel transformation of the BSSRDF to form the associated BRDF and optimize the image confiurations such that the BRDF is close to the known analytic solutions for the associated albedo problem. This ensures reciprocity, accurate colors, and provides an automatic level-of-detail transition for translucent ob"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.0955","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1311.0955/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:16:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1TEs+tz213ha3jUQAXxvWNheNSZKELFmqOQfSH1sOgUbxcx6o4D4x5GoPIxogNJ0hWHhKNIUKewnkc80juOFBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:48:32.831049Z"},"content_sha256":"dc046efe67fe71dfc2d225a511f7c66bd6c8ada1ad1f8aaff614644393bf19e1","schema_version":"1.0","event_id":"sha256:dc046efe67fe71dfc2d225a511f7c66bd6c8ada1ad1f8aaff614644393bf19e1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K3725CZ5VFV6H75PUVF7REDB7X/bundle.json","state_url":"https://pith.science/pith/K3725CZ5VFV6H75PUVF7REDB7X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K3725CZ5VFV6H75PUVF7REDB7X/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-03T18:48:32Z","links":{"resolver":"https://pith.science/pith/K3725CZ5VFV6H75PUVF7REDB7X","bundle":"https://pith.science/pith/K3725CZ5VFV6H75PUVF7REDB7X/bundle.json","state":"https://pith.science/pith/K3725CZ5VFV6H75PUVF7REDB7X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K3725CZ5VFV6H75PUVF7REDB7X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:K3725CZ5VFV6H75PUVF7REDB7X","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"5f9836c6a96cc317fbc7a1c88a98e660ea7ab11dc1e534c4fce83eadc2191061","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2013-11-05T03:25:38Z","title_canon_sha256":"11e90cccf4c13929e39e3c8aeaff7bd4cb77643b0372a75385fc8ad5a3788fa3"},"schema_version":"1.0","source":{"id":"1311.0955","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.0955","created_at":"2026-07-05T02:16:09Z"},{"alias_kind":"arxiv_version","alias_value":"1311.0955v2","created_at":"2026-07-05T02:16:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.0955","created_at":"2026-07-05T02:16:09Z"},{"alias_kind":"pith_short_12","alias_value":"K3725CZ5VFV6","created_at":"2026-07-05T02:16:09Z"},{"alias_kind":"pith_short_16","alias_value":"K3725CZ5VFV6H75P","created_at":"2026-07-05T02:16:09Z"},{"alias_kind":"pith_short_8","alias_value":"K3725CZ5","created_at":"2026-07-05T02:16:09Z"}],"graph_snapshots":[{"event_id":"sha256:dc046efe67fe71dfc2d225a511f7c66bd6c8ada1ad1f8aaff614644393bf19e1","target":"graph","created_at":"2026-07-05T02:16:09Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1311.0955/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a novel BSSRDF for rendering translucent materials. Angular effects lacking in previous BSSRDF models are incorporated by using a dual-beam formulation. We employ a Placzek's Lemma interpretation of the method of images and discard diffusion theory. Instead, we derive a plane-parallel transformation of the BSSRDF to form the associated BRDF and optimize the image confiurations such that the BRDF is close to the known analytic solutions for the associated albedo problem. This ensures reciprocity, accurate colors, and provides an automatic level-of-detail transition for translucent ob","authors_text":"Eugene d'Eon","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2013-11-05T03:25:38Z","title":"A Dual-Beam Method-of-Images 3D Searchlight BSSRDF"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.0955","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:67b2e9071e1d3de8c74222d1eb0a4bc50218bb0781da0cb315f1aca8cbbc652a","target":"record","created_at":"2026-07-05T02:16:09Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"5f9836c6a96cc317fbc7a1c88a98e660ea7ab11dc1e534c4fce83eadc2191061","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2013-11-05T03:25:38Z","title_canon_sha256":"11e90cccf4c13929e39e3c8aeaff7bd4cb77643b0372a75385fc8ad5a3788fa3"},"schema_version":"1.0","source":{"id":"1311.0955","kind":"arxiv","version":2}},"canonical_sha256":"56ffae8b3da96be3ffafa54bf89061fdce187060e3fc5de7f3a3d75bd047e519","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"56ffae8b3da96be3ffafa54bf89061fdce187060e3fc5de7f3a3d75bd047e519","first_computed_at":"2026-07-05T02:16:09.926129Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:16:09.926129Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eCjF3o5SJ/vbm38xdXAfpv+9Z2gADKt+/D1U2IqsYzvxEND/KbDP5FQjQrnUrG0QXTgJqD9AdeeBxISjPVPNBg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:16:09.926630Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.0955","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:67b2e9071e1d3de8c74222d1eb0a4bc50218bb0781da0cb315f1aca8cbbc652a","sha256:dc046efe67fe71dfc2d225a511f7c66bd6c8ada1ad1f8aaff614644393bf19e1"],"state_sha256":"1e09ee80b95a64c599da68cbca7eec048ead3e2d275a0ff8ab5a2b89205ac334"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R5rn7zQLMiQZjDVJCjmAtuOOgc/VwSurFVgAE2TsT7MaCTlNeLcF+SiRx7oJfZ6scXQAKx81JSSw3AIRZ7RFAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T18:48:32.835505Z","bundle_sha256":"ebc478a5545f964c83587e9fa30917b60c9209f28ca29f25d6a8fa5a1b2e22fc"}}