Developing mixed-reality (MR) experiments is a challenge as there is a wide variety of functionality to support. This challenge is exacerbated if the MR experiment is multi-user or if the experiment needs to be run out of the lab. We present Ubiq-Exp - a set of tools that provide a variety of functionality to facilitate distributed and remote MR experiments. We motivate our design and tools from recent practice in the field and a desire to build experiments that are easier to reproduce. Key features are the ability to support supervised and unsupervised experiments, and a variety of tools for the experimenter to facilitate operation and documentation of the experimental sessions. We illustrate the potential of the tools through three small-scale pilot experiments. Our tools and pilot experiments are released under a permissive open-source license to enable developers to appropriate and develop them further for their own needs.

My supervisors, Frank ter Haar and Pablo Cesar, for providing invaluable guidance through their constructive feedback, great patience and extensive knowledge.• My colleagues at the Intelligent Imaging department of TNO, for their exciting suggestions, stimulating feedback and infectious enthusiasm.• My mom and sister, for their endless love, support and encouragement.• My grandparents, for always believing in me.

Figure 1: Conceptual overview of our collaborative MR system, in which an AR and a VR user can collaborate remotely. The CVE contains a static 3D model of Space B. Users are represented with avatars. Line illustrations by Suhyun Park (artist).

Figure 1: Conceptual overview of our outdoor CMR system showing a detailed 3D model of a street that a local AR user can experience in collaboration with a remote VR user. The virtual coordinate space of the shared virtual environment is aligned to the real-world surroundings of the AR user (Space B) with QR code markers. Line illustrations by Suhyun Park (artist).