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Area of Science:

Computer Science
Virtual Reality
Human-Computer Interaction

Background:

Occlusions in virtual environments (VEs) hinder user exploration and can cause disorientation.
Existing methods often require physical movement to resolve occlusions, reducing efficiency.

Purpose of the Study:

To present an occlusion management approach for fine-grain occlusions in VEs.
To quantify and localize occlusions, enabling users to explore VEs more efficiently.

Main Methods:

Developed a multiperspective visualization technique to explore occluded VE regions.
Rendered nearby VE geometry conventionally to maintain user orientation.
Quantified and localized residual occlusions as VE voxels invisible from the current viewpoint but visible from adjacent ones.

Main Results:

The approach effectively handles fine-grain occlusions by enabling exploration from the current location.
Controlled studies confirmed improved exploration efficiency.
Perceptual experiments showed no negative impact on spatial awareness, presence, or simulator sickness.

Conclusions:

The proposed occlusion management system significantly enhances VE exploration efficiency.
It provides an intuitive method for users to overcome occlusions without compromising spatial awareness or presence.
This approach offers a valuable tool for immersive virtual environment interaction.