HOM3R: A 3D Viewer for Complex Hierarchical Product Models González-Toledo Daniel Cuevas-Rodríguez María Garre Carlos Molina-Tanco Luis Reyes-Lecuona Arcadio We present HOM3R, a novel 3D viewer designed to manage complex industrial product models. The viewer includes a JavaScript API to interface with existing or new browser-based applications. We extend state-of-the art interaction techniques and introduce a novel navigation metaphor to navigate around complex products using constrained trajectories. To address the challenge of discovering and accessing the parts of the complex object, which are not visible, a set of occlusion management techniques have been implemented. The viewer presents other useful features such as hierarchical part selection and linking of information to 3D geometry. A user-centred evaluation of the tool has been carried out and is described in the paper Human-centered computing Virtual Reality Web-based interaction interaction techniques 004 periodical academic journal Journal of Virtual Reality and Broadcasting 14(2017) 3 2018 1860-2037 urn:nbn:de:0009-6-46966 10.20385/1860-2037/14.2017.3 http://nbn-resolving.de/urn:nbn:de:0009-6-46966 gonzález-toledo2018