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Related Experiment Video

Updated: Jul 9, 2026

Cooling Rate Dependent Ellipsometry Measurements to Determine the Dynamics of Thin Glassy Films

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Published on: January 26, 2016

Virtual ellipsometry on layered micro-facet surfaces.

Chi Wang, Alexander Wilkie, Petr Harcuba

|October 19, 2017

Summary

This summary is machine-generated.

Polarisation-aware simulations are crucial for accurately rendering some glossy surfaces in computer graphics, especially layered dielectrics. Ignoring light polarisation can lead to significant errors in Bidirectional Reflectance Distribution Function (BRDF) shape estimation.

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Last Updated: Jul 9, 2026

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Area of Science:

Computer Graphics
Optics
Material Science

Background:

Microfacet-based Bidirectional Reflectance Distribution Function (BRDF) models are vital for simulating light scattering from glossy surfaces in computer graphics and optics.
Existing BRDF models often approximate light interaction, leading to potential inaccuracies, especially for complex materials.

Purpose of the Study:

To investigate the impact of light polarisation on the accuracy of BRDF simulations for microfacet surfaces in computer graphics.
To develop and validate a polarisation-aware brute force simulation for microfacet surfaces.

Main Methods:

Developed a polarisation-aware brute force simulation for light interaction with single and multiple layered microfacet surfaces.
Validated the simulation against state-of-the-art graphics models, optics libraries, and ellipsometric measurements of real surfaces.

Main Results:

Non-polarising computations can mis-estimate BRDF shape by up to 23% for materials like smooth layered dielectrics.
The effect of polarisation is negligible for certain materials, such as dielectric layers over rough conductors.
Validated simulation software against multiple benchmarks.

Conclusions:

Polarisation is a critical factor for accurate BRDF simulation of specific material types, while it can be ignored for others.
The validated simulation provides a reliable tool for accurate BRDF analysis and computer graphics rendering.