  This paper introduces RealityEffects, a desktop authoring interface designed
for editing and augmenting 3D volumetric videos with object-centric annotations
and visual effects. RealityEffects enhances volumetric capture by introducing a
novel method for augmenting captured physical motion with embedded, responsive
visual effects, referred to as object-centric augmentation. In RealityEffects,
users can interactively attach various visual effects to physical objects
within the captured 3D scene, enabling these effects to dynamically move and
animate in sync with the corresponding physical motion and body movements. The
primary contribution of this paper is the development of a taxonomy for such
object-centric augmentations, which includes annotated labels, highlighted
objects, ghost effects, and trajectory visualization. This taxonomy is informed
by an analysis of 120 edited videos featuring object-centric visual effects.
The findings from our user study confirm that our direct manipulation
techniques lower the barriers to editing and annotating volumetric captures,
thereby enhancing interactive and engaging viewing experiences of 3D volumetric
videos.
