CALL FOR PROPOSALS SHREC2026 - 3D Shape Retrieval Challenge 2026 http://www.shrec.net/ At Eurographics 2026 Symposium on 3D Object Retrieval, 3-4 September 2026 Nota bene: Full paper submissions will follow a two-stage review process and will be published in the international journal Computes & Graphics upon acceptance. We strongly encourage to consider the graphics replicability stamp initiative, http://www.replicabilitystamp.org/, and to apply for this additional sign of recognition. Introduction The general objective of the 3D Shape Retrieval Challenge is to evaluate the effectiveness of 3D-shape retrieval algorithms. SHREC2026 is the twenty-first edition of the challenge. Like previous years, it is organized in conjunction with the Eurographics Symposium on 3D Object Retrieval (3dor.org<https://3dor.org/>)/>), where the results will be reviewed and presented at the symposium. Thanks to the efforts of previous track organizers, SHREC already provides many resources to compare and evaluate 3D retrieval methods. For this year's contest, we aim to explore new and updated tracks. Therefore, the participants are invited to have an active role in the organization of the event. This includes proposing track themes, building or acquiring a training and test collection, and deciding upon the queries, relevance assessment, and performance measures. The participants of each track will collectively write a paper, which will be peer reviewed, and published in Computers & Graphics upon acceptance. At least one author per track must register for the symposium, and present the results. The registration must be unique for the paper, multiple papers on one registration does not count. We also cordially invite all other participants of a track to register and attend the workshop. Tracks The tracks organized in the past years have covered different aspects and tasks of 3D shape retrieval, for example: rigid or non-rigid models; partial (e.g. range scan) or complete models; sketch-based 3D retrieval; generic or domain specific models (e.g. CAD, biometrics, architectural and molecular), and various aspects such as metric learning, outlier detection, correspondence, robustness, stability, registration, classification, recognition, pose estimation, and machine learning, and change detection. Now we solicit again proposals for tracks. You may opt for one of the above themes, or propose new ones. Track organizers are responsible for all aspects of organizing the track, such as: the task, the data collection (copyright issues, etc.), the queries, the ground truth, the experimental design, the evaluation method, the procedural aspects, writing the final paper in collaboration with the collaborators, and submitting it. See below for examples of previous SHREC editions. We strongly encourage to consider the graphics replicability stamp initiative, http://www.replicabilitystamp.org/, to apply for this additional sign of recognition, and to include this in your track proposal. Procedure The following list is a step-by-step description of the activities: * Potential track organizers send their proposal to R.C.Veltkamp@uu.nl<mailto:R.C.Veltkamp@uu.nl>. * describing the envisioned task, collection, queries, ground truth, evaluation method, expected number of participants, and plans to apply for the graphics replicability stamp. * Promising tracks and their organizers will be listed at the SHREC web page, the track organizers start working out the details and recruite participants. * Participants register for the tracks they want to participate in. * Each track is performed according to its own schedule, compliant with the symposium submission and reviewing schedule. * The track organizers collect the results. * The track results are combined into a joint paper. Papers are subject to peer review, accepted journal papers are published in Computers & Graphics. * The description of the tracks and their results are presented at Eurographics 2026 Symposium on 3D Object Retrieval, 3-4 September 2026<https://sites.google.com/view/3dor26/>6/>. SHREC Time Schedule Important dates * January 9, 2026: Submission deadline for track proposals. * January 12, 2026: Notification of acceptance of track proposals. * January 12 to April 20, 2026: Each track has its own time line. * April 20, 2026: Submission deadline for full papers for review. * May 25, 2026: First review done, first stage decision on acceptance or rejection. * June 19, 2026: First revision due. * July 3, 2026: Second stage of reviews complete, decision on acceptance, rejection, or acceptance as short paper. * July 20, 2026: Final version submission. * July 30, 2026: Final decision on acceptance or rejection. * September 2026: Publication online in Computers & Graphics journal. * September 3-4, 2026: Presentation at the Eurographics 2026 Symposium on 3D Object Retrieval<https://sites.google.com/view/3dor26/>6/>. The individual tracks will have their own time schedule for registration of participants, release of queries or submission of executables, and submission of results, etc. Organization For information about the contest, the results, etc. of previous years, see past events: SHREC2025<https://www.shrec.net/SHREC2025%20Call%20for%20Participation.h… <https://www.shrec.net/SHREC2025%20Call%20for%20Participation.html> SHREC 2024<http://www.shrec.net/SHREC2024%20Call%20for%20Participation.html> SHREC 2023<http://www.shrec.net/SHREC2023%20Call%20for%20Participation.html> SHREC 2022<http://www.shrec.net/SHREC2022%20Call%20for%20Participation.html> SHREC 2021<http://www.shrec.net/SHREC2021%20Call%20for%20Participation.html> SHREC 2020<https://workshop.cgv.tugraz.at/3dor2020/shrec2020.php> SHREC 2019<http://3dor2019.ge.imati.cnr.it/shrec-2019/> SHREC 2018<http://www.shrec.net/index2018-cfparticipation.html>ml>, SHREC 2017<http://liris.cnrs.fr/eg3dor2017/#shrec>, SHREC 2016<http://www.shrec.net/index2016-cfparticipation.html>ml>, SHREC 2015<https://www.shrec.net/index2015-cfparticipation.html>ml>, SHREC 2014<http://3dor2014.ensea.fr/SHREC2014.html>, SHREC 2013<http://3dor2013.di.univr.it/SCREC2013.html> ________________________________ R.C.Veltkamp@uu.nl<mailto:R.C.Veltkamp@uu.nl>, www.uu.nl/staff/RCVeltkamp<http://www.uu.nl/staff/RCVeltkamp> Department of Information and Computing Sciences, Utrecht University<https://www.uu.nl/en/organisation/department-of-information-and-computing-sciences> AI Labs<https://www.uu.nl/en/research/ai-labs/> | Center for Game Research<http://www.gameresearch.nl/> ________________________________