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Physically based rendering in immersive virtual reality: an optimization approach for tuning lighting, color, and
Optics Express
|March 18, 2026
Summary
This study introduces a new method to accurately calibrate virtual reality lighting and materials using physical measurements and perceptual metrics. This ensures realistic visual experiences in immersive virtual environments.
Area of Science:
- Computer Graphics
- Virtual Reality
- Human-Computer Interaction
Background:
- Physically based rendering (PBR) and immersive virtual reality (VR) are increasingly used for lighting design and visual evaluation.
- Existing simulation tools struggle to accurately reproduce real-world photometric and colorimetric characteristics in VR.
- Accurate modeling requires bridging physical measurements with rendered visual output, but methods for aligning real and virtual scenes are limited.
Purpose of the Study:
- To present a novel methodology for calibrating lighting and material parameters in PBR environments for immersive VR.
- To improve the photometric and colorimetric accuracy of virtual scenes compared to real-world environments.
- To enhance the color space representation for VR displays.
Main Methods:
- Integration of spectral and photometric measurements with perceptual metrics and optimization algorithms.
- Development of an algorithm to compute an optimized RGB transformation matrix from spectral reflectance data.
- Implementation of an algorithm to adjust lighting and material properties by minimizing a composite perceptual metric for color and image structure.
Main Results:
- Automatic estimation of PBR properties for light sources and materials.
- Significant improvement in color space representation for VR displays.
- High agreement between real and virtual colors, with strong scores for visual realism (Q2=4.0/5.0) and satisfaction (Q16=4.8/5.0) in a perceptual study with 23 participants.
Conclusions:
- The proposed methodology effectively integrates PBR with perceptual metrics for photometrically and visually realistic scene generation in immersive VR.
- This approach addresses limitations in aligning real and virtual scenes, offering a more accurate simulation for lighting design and visual evaluation.
- The findings pave the way for more reliable and perceptually accurate virtual reality experiences.
