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Procedural Cloudscapes

Antoine Webanck 1, 2 Yann Cortial 1, 2 Eric Guérin 1, 2 Eric Galin 1, 2
1 GeoMod - Modélisation Géométrique, Géométrie Algorithmique, Fractales
LIRIS - Laboratoire d'InfoRmatique en Image et Systèmes d'information
Abstract : We present a phenomenological approach for modeling and animating cloudscapes. We propose a compact procedural model for representing the different types of cloud over a range of altitudes. We define primitive-based field functions that allow the user to control and author the cloud cover over large distances easily. Our approach allows us to animate cloudscapes by morphing: instead of simulating the evolution of clouds using a physically-based simulation, we compute the movement of clouds using key-frame interpolation and tackle the morphing problem as an Optimal Transport problem. The trajectories of the cloud cover primitives are generated by solving an Anisotropic Shortest Path problem with a cost function that takes into account the elevation of the terrain and the parameters of the wind field.
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Contributor : Eric Guérin Connect in order to contact the contributor
Submitted on : Wednesday, March 14, 2018 - 11:08:18 AM
Last modification on : Tuesday, June 1, 2021 - 2:08:08 PM



Antoine Webanck, Yann Cortial, Eric Guérin, Eric Galin. Procedural Cloudscapes. Computer Graphics Forum, Wiley, 2018, 37 (2), pp.431--442. ⟨10.1111/cgf.13373⟩. ⟨hal-01730789⟩



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