{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,26]],"date-time":"2026-02-26T19:34:43Z","timestamp":1772134483107,"version":"3.50.1"},"reference-count":37,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2022,10,26]],"date-time":"2022-10-26T00:00:00Z","timestamp":1666742400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Computer Graphics Forum"],"published-print":{"date-parts":[[2023,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Simulating light\u2013matter interaction is a fundamental problem in computer graphics. A particular challenge is the simulation of light interaction with rough surfaces due to diffraction and multiple scattering phenomena. To properly model these phenomena, wave\u2010optics have to be considered. Nevertheless, the most accurate BRDF models, including wave\u2010optics, are computationally expensive, and the resulting renderings have not been systematically compared to real\u2010world measurements. This work sheds more light on reflectance variations due to surface roughness. More specifically, we look at wavelength shifts that lead to reddish and blueish appearances. These wavelength shifts have been scarcely reported in the literature, and, in this paper, we provide the first thorough analysis from precise measured data. We measured the spectral in\u2010plane BRDF of aluminium samples with varying roughness and further acquired the surface topography with a confocal microscope. The measurements show that the rough samples have, on average, a reddish and blueish appearance in the forward and back\u2010scattering, respectively. Our investigations conclude that this is a diffraction\u2010based effect that dominates the overall appearance of the samples. Simulations using a virtual gonioreflectometer further confirm our claims. We propose a linear model that can closely fit such phenomena, where the slope of the wavelength shifts depends on the incident and reflection direction. Based on these insights, we developed a simple BRDF model based on the Cook\u2013Torrance model that considers such wavelength\u00a0shifts.<\/jats:p>","DOI":"10.1111\/cgf.14717","type":"journal-article","created":{"date-parts":[[2022,10,26]],"date-time":"2022-10-26T16:42:39Z","timestamp":1666802559000},"page":"245-260","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Investigation and Simulation of Diffraction on Rough Surfaces"],"prefix":"10.1111","volume":"42","author":[{"given":"O.","family":"Clausen","sequence":"first","affiliation":[{"name":"TH K\u00f6ln K\u00f6ln Germany"},{"name":"Federal University of Rio de Janeiro Rio de Janeiro Brazil"}]},{"given":"Y.","family":"Chen","sequence":"additional","affiliation":[{"name":"Delft University of Technology Delft The Netherlands"}]},{"given":"A.","family":"Fuhrmann","sequence":"additional","affiliation":[{"name":"TH K\u00f6ln K\u00f6ln Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8299-7067","authenticated-orcid":false,"given":"R.","family":"Marroquim","sequence":"additional","affiliation":[{"name":"Delft University of Technology Delft The Netherlands"}]}],"member":"311","published-online":{"date-parts":[[2022,10,26]]},"reference":[{"issue":"7","key":"e_1_2_9_2_1","first-page":"1629","article-title":"Characterisation of electropolished aluminium surfaces","volume":"95","author":"Buhlert M.","year":"2004","journal-title":"Galvanotechnik"},{"key":"e_1_2_9_3_1","first-page":"78","volume-title":"Proceedings of the Imaging Spectrometry XX","author":"Butler S. 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