{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:YRV5BLGI4RXV6XIVTTSRQ3WY42","short_pith_number":"pith:YRV5BLGI","canonical_record":{"source":{"id":"1808.06715","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2018-08-20T22:54:53Z","cross_cats_sorted":[],"title_canon_sha256":"688a517b3fb1970639e71ac929c8fa923bd94144274fe87f0b26a0f7d55bc415","abstract_canon_sha256":"8a60e135afd540e3eedc809af57abd96ed9fb889d339ca305fbbc9283b679caf"},"schema_version":"1.0"},"canonical_sha256":"c46bd0acc8e46f5f5d159ce5186ed8e68d6cd652e7457ee82d7fa8812e29c632","source":{"kind":"arxiv","id":"1808.06715","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06715","created_at":"2026-05-18T00:07:39Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06715v1","created_at":"2026-05-18T00:07:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06715","created_at":"2026-05-18T00:07:39Z"},{"alias_kind":"pith_short_12","alias_value":"YRV5BLGI4RXV","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YRV5BLGI4RXV6XIV","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YRV5BLGI","created_at":"2026-05-18T12:33:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:YRV5BLGI4RXV6XIVTTSRQ3WY42","target":"record","payload":{"canonical_record":{"source":{"id":"1808.06715","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2018-08-20T22:54:53Z","cross_cats_sorted":[],"title_canon_sha256":"688a517b3fb1970639e71ac929c8fa923bd94144274fe87f0b26a0f7d55bc415","abstract_canon_sha256":"8a60e135afd540e3eedc809af57abd96ed9fb889d339ca305fbbc9283b679caf"},"schema_version":"1.0"},"canonical_sha256":"c46bd0acc8e46f5f5d159ce5186ed8e68d6cd652e7457ee82d7fa8812e29c632","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:07:39.310248Z","signature_b64":"dgd5Ml1zvxIknHdGCc9mTrosMOLdvtQS0QEQ8iruLi+qjDFaTIbpAkfwwM2UsPUtwQeOr80Z+9aGHkscyRqrAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c46bd0acc8e46f5f5d159ce5186ed8e68d6cd652e7457ee82d7fa8812e29c632","last_reissued_at":"2026-05-18T00:07:39.309772Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:07:39.309772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.06715","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:07:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IUcn8h2uryDtcMZ6E2T/XqEXKnZ0cEQBUYvQZXB7aU53Vvn+v15BYU+fxO5JCcMvrguCHWg5Pw5nLFglxrA4DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T22:57:51.115146Z"},"content_sha256":"93b056f8342d04fe9c7aba596383a72826448b896b0a05dc1ce4b2c67a47d7db","schema_version":"1.0","event_id":"sha256:93b056f8342d04fe9c7aba596383a72826448b896b0a05dc1ce4b2c67a47d7db"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:YRV5BLGI4RXV6XIVTTSRQ3WY42","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Image-based remapping of spatially-varying material appearance","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.GR","authors_text":"Alejandro Sztrajman, Alexander Wilkie, Jaroslav Krivanek, Tim Weyrich","submitted_at":"2018-08-20T22:54:53Z","abstract_excerpt":"BRDF models are ubiquitous tools for the representation of material appearance. However, there is now an astonishingly large number of different models in practical use. Both a lack of BRDF model standardisation across implementations found in different renderers, as well as the often semantically different capabilities of various models, have grown to be a major hindrance to the interchange of production assets between different rendering systems. Current attempts to solve this problem rely on manually finding visual similarities between models, or mathematical ones between their functional s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06715","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T00:07:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ERyFSiMICjWDplz1He0zyPpDaHOprviJXMnOTANW/0nVHXeejxEBKIfHs5vz7Xr7DpBaqak4Nhj4hZmi1XNsBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T22:57:51.115396Z"},"content_sha256":"9a5cb11811dc0431f401d8844a0dc0c0fa8c19807421f3b506f0f6c94385ed3b","schema_version":"1.0","event_id":"sha256:9a5cb11811dc0431f401d8844a0dc0c0fa8c19807421f3b506f0f6c94385ed3b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YRV5BLGI4RXV6XIVTTSRQ3WY42/bundle.json","state_url":"https://pith.science/pith/YRV5BLGI4RXV6XIVTTSRQ3WY42/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YRV5BLGI4RXV6XIVTTSRQ3WY42/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":"2026-07-31T22:57:51Z","links":{"resolver":"https://pith.science/pith/YRV5BLGI4RXV6XIVTTSRQ3WY42","bundle":"https://pith.science/pith/YRV5BLGI4RXV6XIVTTSRQ3WY42/bundle.json","state":"https://pith.science/pith/YRV5BLGI4RXV6XIVTTSRQ3WY42/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YRV5BLGI4RXV6XIVTTSRQ3WY42/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:YRV5BLGI4RXV6XIVTTSRQ3WY42","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":"8a60e135afd540e3eedc809af57abd96ed9fb889d339ca305fbbc9283b679caf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2018-08-20T22:54:53Z","title_canon_sha256":"688a517b3fb1970639e71ac929c8fa923bd94144274fe87f0b26a0f7d55bc415"},"schema_version":"1.0","source":{"id":"1808.06715","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06715","created_at":"2026-05-18T00:07:39Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06715v1","created_at":"2026-05-18T00:07:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06715","created_at":"2026-05-18T00:07:39Z"},{"alias_kind":"pith_short_12","alias_value":"YRV5BLGI4RXV","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YRV5BLGI4RXV6XIV","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YRV5BLGI","created_at":"2026-05-18T12:33:04Z"}],"graph_snapshots":[{"event_id":"sha256:9a5cb11811dc0431f401d8844a0dc0c0fa8c19807421f3b506f0f6c94385ed3b","target":"graph","created_at":"2026-05-18T00:07:39Z","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"},"paper":{"abstract_excerpt":"BRDF models are ubiquitous tools for the representation of material appearance. However, there is now an astonishingly large number of different models in practical use. Both a lack of BRDF model standardisation across implementations found in different renderers, as well as the often semantically different capabilities of various models, have grown to be a major hindrance to the interchange of production assets between different rendering systems. Current attempts to solve this problem rely on manually finding visual similarities between models, or mathematical ones between their functional s","authors_text":"Alejandro Sztrajman, Alexander Wilkie, Jaroslav Krivanek, Tim Weyrich","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2018-08-20T22:54:53Z","title":"Image-based remapping of spatially-varying material appearance"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06715","kind":"arxiv","version":1},"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":"sha256:93b056f8342d04fe9c7aba596383a72826448b896b0a05dc1ce4b2c67a47d7db","target":"record","created_at":"2026-05-18T00:07:39Z","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":"8a60e135afd540e3eedc809af57abd96ed9fb889d339ca305fbbc9283b679caf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2018-08-20T22:54:53Z","title_canon_sha256":"688a517b3fb1970639e71ac929c8fa923bd94144274fe87f0b26a0f7d55bc415"},"schema_version":"1.0","source":{"id":"1808.06715","kind":"arxiv","version":1}},"canonical_sha256":"c46bd0acc8e46f5f5d159ce5186ed8e68d6cd652e7457ee82d7fa8812e29c632","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c46bd0acc8e46f5f5d159ce5186ed8e68d6cd652e7457ee82d7fa8812e29c632","first_computed_at":"2026-05-18T00:07:39.309772Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:39.309772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dgd5Ml1zvxIknHdGCc9mTrosMOLdvtQS0QEQ8iruLi+qjDFaTIbpAkfwwM2UsPUtwQeOr80Z+9aGHkscyRqrAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:39.310248Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.06715","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93b056f8342d04fe9c7aba596383a72826448b896b0a05dc1ce4b2c67a47d7db","sha256:9a5cb11811dc0431f401d8844a0dc0c0fa8c19807421f3b506f0f6c94385ed3b"],"state_sha256":"9985ffc8314dd024a69b847a99d6afcbee6d8a59d172582cbd99083d3a399b68"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"blsk7G6AGwOOHF/jz3f/j+95bdDhKJdRy/hm23U2hkVdCL7Y2Xu0n9uYz+qXlzToPB9wACj/TxcbryIrHtcvCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T22:57:51.118934Z","bundle_sha256":"3e549e674f835dbf42a0c8cf2d934a3abf5f0ad041e3a5018b51f7fff92ab1d6"}}