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Related Experiment Video

Updated: Apr 30, 2026

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Published on: May 20, 2013

Spatial Multiple Importance Sampling for Real-Time Irradiance Probes.

Tuo Chen, Zi-Heng Zhou, Lingqi Yan

IEEE Transactions on Visualization and Computer Graphics

|March 3, 2026

Summary

This summary is machine-generated.

This study introduces spatial multiple importance sampling to reduce flickering in real-time global illumination. The technique reuses ray-surface data for irradiance probes, significantly lowering variance and improving image stability in complex scenes.

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Area of Science:

Computer Graphics
Real-time Rendering
Computational Imaging

Background:

Real-time global illumination rendering with low variance is a significant challenge.
Current methods like irradiance probes often produce flickering artifacts due to computational budget constraints.

Purpose of the Study:

To significantly reduce flicker artifacts in real-time global illumination rendering.
To enable efficient computation in complex scenes under limited ray tracing budgets.

Main Methods:

Proposing spatial multiple importance sampling (SMIS).
Reusing ray-surface intersection data among real-time irradiance probes.
Incorporating a probe selection mechanism and a visibility estimation method.

Main Results:

Demonstrated significant reduction in rendering variance at a fixed ray tracing cost.
Achieved high-quality, stable outputs in real-time scenarios.
Enabled efficient computation in complex scenes.

Conclusions:

Spatial multiple importance sampling effectively mitigates flicker artifacts caused by variance in real-time global illumination.
The proposed method enhances probe reuse efficiency and reduces bias.
This technique offers a viable solution for stable, high-quality real-time rendering.