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Object-based warping in three-dimensional environments.

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Object-based warping, a visual illusion, persists in 3D environments. This study confirms the warping effect in naturalistic 3D settings, even with depth cues.

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Area of Science:

  • Visual Perception
  • Cognitive Psychology
  • 3D Vision

Background:

  • Object-based warping is a visual illusion where space within figures is overestimated.
  • Previous research focused on two-dimensional (2D) stimuli.
  • Naturalistic viewing conditions may alter this effect.

Purpose of the Study:

  • To investigate object-based warping in three-dimensional (3D) environments.
  • To determine if the warping effect persists with contextual cues.
  • To explore the influence of depth cues on warping under occlusion.

Main Methods:

  • Experiments used 3D printed objects and virtual reality (VR) stimuli.
  • Participants estimated distances of features (dots).
  • VR experiments involved various object types, spatial separations, viewing distances, and head motion tracking.

Main Results:

  • A standard object-based warping effect was observed in all 3D experiments.
  • The effect was absent in a 2D occlusion condition but present when simplified.
  • Depth cues influenced the warping effect under occlusion.

Conclusions:

  • Object-based warping is a robust effect, extending to naturalistic 3D viewing.
  • The presence and nature of depth cues significantly modulate the warping effect.
  • This research validates the warping illusion in complex, real-world-like scenarios.