Boundaries such as walls, windows, and doors are ubiquitous in the physical world, yet their potential in mixed reality (MR) remains underexplored. We present Unbounded, a Research through Design inquiry into object--boundary interaction (OBI). Building on prior work, we articulate a design space aimed at providing a shared language for OBI. To demonstrate its potential, we design and implement eight examples across productivity and art exploration scenarios, showcasing how OBIs can enrich and reframe everyday interactions. We further engage with six MR experts in one-on-one feedback sessions, using the design space and examples as design probes. Their reflections broaden the conceptual scope of OBI, reveal new possibilities for how the framework may be applied, and highlight implications for future MR interaction design. https://www.zhuoyuelyu.com/unbounded

翻译：墙壁、窗户和门等边界在物理世界中无处不在，但它们在混合现实（MR）中的潜力仍未得到充分探索。我们提出“无界”（Unbounded），一项通过设计研究（Research through Design）对对象-边界交互（OBI）的探究。基于先前研究，我们阐明了一个设计空间，旨在为OBI提供共享语言。为展示其潜力，我们设计并实现了八个跨越生产力与艺术探索场景的示例，展示了OBI如何丰富并重新定义日常交互。我们进一步与六位MR专家进行一对一反馈会议，将设计空间和示例作为设计探针（design probes）。他们的反思拓展了OBI的概念范围，揭示了该框架可能应用的新可能性，并凸显了对未来MR交互设计的影响。https://www.zhuoyuelyu.com/unbounded