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Rendering of Underwater Scenes
 Smutný, Martin ; Vlnas, Michal (oponent) ; Milet, Tomáš (vedoucí práce)
The goal of this thesis is to render underwater scenes and lighting effects typical for such scenes in high quality at interactive frame rates. The focus is specifically on physically-based rendering of oceanic waters because of their complex and highly variable optical properties. Rendering such media requires a simulation of light scattering inside the water body. Relevant real-time methods are thoroughly investigated. A simple oceanic scene is designed that consist of a procedurally generated terrain, water surface and a atmospheric model. A physically-based bio-optical model of the water volume was proposed. Single scattering in the volume is approximated by explicitly rendering physically-based one-bounce surface and volume caustics. Multiple scattering is approximated by exploiting the properties of such waters. The proposed techniques were implemented. The scene can be rendered from above or below the water. The techniques render the effects in the water volume at acceptable quality, and interactive frame rates are obtained at lower-end GPU.
Úplný záznam
Rendering of Underwater Scenes
 Smutný, Martin ; Vlnas, Michal (oponent) ; Milet, Tomáš (vedoucí práce)
This thesis focuses on rendering realistic underwater environments using real-time techniques. Focus is on rendering ocean waters because of their complex and highly variable optical properties. Rendering such media is a challenging field in computer graphics that involves simulation of light scattering inside the water body. Methods in the field of real-time computer graphics for rendering and simulation of oceans are investigated. Single scattering and multi scattering approximation techniques are designed to render a water volume using ray marching. The optical properties of the volume are described by a physically-based bio-optical model. Furthermore, surface and volumetric caustics are rendered as they refract through a simulated ocean surface using Fourier transform. The designed technique to render underwater environments was not implemented in its entirety. Only a certain subset of techniques was experimented with.
Úplný záznam

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