Distance mis-estimations can be reduced with specific shadow locations.

Area of Science:

• Virtual Reality
• Human Perception
• Computer Graphics

Background:

• Shadows are prevalent in physical environments but their role in virtual environments is understudied.
• Understanding shadow perception is crucial for creating realistic virtual experiences.

Purpose of the Study:

• To investigate if target shadows serve as distance cues in virtual reality.
• To determine the impact of shadow abundance and placement on distance perception.
• To assess the influence of environmental clutter on these effects.

Main Methods:

• Participants performed a perceptual matching task in virtual reality under six lighting conditions.
• The experiment was conducted in both sparse and cluttered virtual environments.
• Distance estimation accuracy and variability were measured.

Main Results:

• Distance underestimation occurred across all conditions, as predicted.
• Lighting positioned directly above the target minimized distance mis-estimation.
• Ambient lighting resulted in the most variable and inaccurate distance estimates.
• No significant difference in performance was found between sparse and cluttered environments, though individual responses varied.

Conclusions:

• Shadows play a role in distance perception in virtual reality.
• Specific lighting conditions, particularly overhead lighting, can improve distance estimation accuracy.
• Environmental clutter's effect on distance perception in VR is complex and warrants further investigation.