Rendering Iridescent Rock Dove Neck Feathers

Huang, Weizhen; Merzbach, Sebastian; Callenberg, Clara; Stavenga, Doekele G.; Hullin, Matthias B.

doi:10.1145/3528233.3530749

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…Guillen et al [19] presented a generic model to reproduce pearlescent materials, and Benamira and Sumanta [5] focused on diffraction-aware hair rendering. Further, Huang et al [24] developed a model to compute the structural color of the feathers on pigeon necks, and Guo et al [20] proposed a light-scattering model that pre-computes and considers diffraction and interference by nearby particles in participating media. Finally, Xia et al [60] reproduced Quetelet scattering, which is the interference between light scattered by particles and light reflected on a water surface.…”

Section: Structural Color In Computer Graphicsmentioning

confidence: 99%

Visual simulation of opal using bond percolation through the weighted Voronoi diagram and the Ewald construction

Yokota,

Fujishiro

2024

Preprint

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Opal, a renowned gemstone, exhibits an optical phenomenon known as ''play of color,'' which is classified as a kind of structural color. This unique property makes opal a highly valuable material from the natural science, industry, and humanity perspectives. Opal has a complex internal structure called colloidal polycrystalline, and thus, representations of opal remain unestablished in computer graphics. In this study, to approximate the complex internal structure of opal, we imitate its formation process using the three-dimensional additively weighted Voronoi tessellation and percolation model. Further, we apply path tracing to compute the diffraction patterns of visible light inside opal by utilizing the Ewald construction employed in X-ray diffraction theory. Finally, we achieve a visually plausible output through spectral rendering.

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Section: Structural Color In Computer Graphicsmentioning

confidence: 99%

Visual simulation of opal using bond percolation through the weighted Voronoi diagram and the Ewald construction

Yokota,

Fujishiro

2024

Preprint

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“…Iridescence mainly occurs due to thin film diffraction or diffraction due to microscopic surface structures. Models for thin films [9,10,42,43,44,45], surface diffraction [46,47,48,49,50] and the combination of the two [12,11,51,52,53,54] have been developed for various applications.…”

Section: Iridescent Modelsmentioning

confidence: 99%

“…Recently these effects have been modeled [49,50,56]. Various bird feathers also cause iridescence due to thin film diffraction in the layers of the feathers [45].…”

Section: Iridescent Modelsmentioning

confidence: 99%

Iridescent Reflectance Model for Pāua Shells

Stangnes¹

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<p>Haliotis Iris shells, commonly known as Pāua shells, are used in jewelry, decorations, and certain Maōri artifacts. Digital twins can be used to digitally preserve these objects, as well as accurately visualising them in media. Accurate representation of the Pāua material is essential to this process. Pāua shells are composed of a complex multi-layer microstructure which, due to Bragg diffraction, creates intensely colorful iridescence. Iridescence can also occur in various other material structures, and reflectance models to capture either general iridescence for these materials or highly specific iridescence, like for bird feathers and soap bubbles, have been developed. However, these models do no encapsulate the unique properties of Pāua shells. These previous models significantly limit the number of layers used, do not consider the natural thickness variation and gradient within the layered structure, and none consider the cyclic growth band structure responsible for the high contrast patterning of the shells when polished. Therefore, a specific iridescent reflectance model unique to Pāua must be developed. I propose an iridescent reflectance model specifically tailored to Pāua shells, accompanied by a texture to define the layers and pattern of the shell. The model fully simulates multiple layers given an adjustable threshold and a gradient for the layer thickness variation within each growth cycle. This model present a specific and complete solution to rendering Pāua shells which has not previously been done, as well as allowing for an input texture to realistically or artistically recreate the shell patterning.</p>

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Visual simulation of opal using bond percolation through the weighted Voronoi diagram and the Ewald construction

Yokota,

Fujishiro

2024

Vis Comput

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Rendering Iridescent Rock Dove Neck Feathers

Cited by 5 publications

References 32 publications

Visual simulation of opal using bond percolation through the weighted Voronoi diagram and the Ewald construction

Visual simulation of opal using bond percolation through the weighted Voronoi diagram and the Ewald construction

Iridescent Reflectance Model for Pāua Shells

Visual simulation of opal using bond percolation through the weighted Voronoi diagram and the Ewald construction

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