Improving Spatial Awareness in Video Mirror-Mediated XR Telementoring through Visual Cues

The quality of collaboration between an on-site novice user and a remote expert in cross-reality (XR) settings depends on mutual spatial awareness. Non-stereo video mirrors in Augmented Reality (AR) - Virtual Reality (VR) telementoring settings lack depth cues to meaningfully implement 3D interaction techniques like gesture guiding and gaze cues. This work introduces a visual cue for non-static video streams that acts as an add-on to these interaction techniques, drawing from principles of monocular depth perception. Descriptive results from a comparative within-design user study indicate that the "illumination cue" can improve spatial awareness primarily for the remote expert.