000146054 001__ 146054 000146054 005__ 20241122150934.0 000146054 037__ $$aTAZ-TFM-2023-053 000146054 041__ $$aeng 000146054 1001_ $$aGarcía Liñán, Fernando 000146054 24200 $$aPhysically-Based Sky and Atmosphere Rendering in Real-Time. 000146054 24500 $$aPhysically-Based Sky and Atmosphere Rendering in Real-Time. 000146054 260__ $$aZaragoza$$bUniversidad de Zaragoza$$c2023 000146054 506__ $$aby-nc-sa$$bCreative Commons$$c3.0$$uhttp://creativecommons.org/licenses/by-nc-sa/3.0/ 000146054 520__ $$aIn this Master Thesis, we propose a physically-based method to render the atmosphere of Earth in real time from any arbitrary viewpoint. Atmosphere rendering is a difficult problem to solve due to its inherent complexity. The physics equations that describe the scattering of light feature multiple nested integrals that must be computed numerically or approximated. Moreover, the atmospheric medium is strongly dependent on the wavelength of incoming light, which makes spectral rendering a requirement to faithfully represent the colors of sky. Our main contribution relies on an approximation to spectral rendering, where instead of computing dozens of spectral samples, only four carefully chosen samples are used to evaluate the final color. This makes our method exceptionally cheap and accurate, as it is able to produce images that are perceptually indistinguishable from those generated by a fully-fledged spectral renderer, at a fraction of the computational cost. We also propose an approximation to multiple light scattering that significantly reduces the computational cost of evaluating the light transport equations. We tackle the issue of developing an atmospheric model that is highly configurable and able to represent a wide variety of atmospheric conditions, while still being physically-based and suitable for real-time applications. Finally, we implement our method on Shadertoy to prove its high portability and ease of implementation, and we demonstrate how the results compare to a ground truth path tracing simulation.<br /><br /> 000146054 521__ $$aMáster Universitario en Robótica, Gráficos y Visión por Computador 000146054 540__ $$aDerechos regulados por licencia Creative Commons 000146054 700__ $$aMuñoz Orbañanos, Adolfo$$edir. 000146054 7102_ $$aUniversidad de Zaragoza$$bInformática e Ingeniería de Sistemas$$cLenguajes y Sistemas Informáticos 000146054 8560_ $$f865285@unizar.es 000146054 8564_ $$s4756345$$uhttps://zaguan.unizar.es/record/146054/files/TAZ-TFM-2023-053.pdf$$yMemoria (eng) 000146054 909CO $$ooai:zaguan.unizar.es:146054$$pdriver$$ptrabajos-fin-master 000146054 950__ $$a 000146054 951__ $$adeposita:2024-11-22 000146054 980__ $$aTAZ$$bTFM$$cEINA 000146054 999__ $$a20230127201004.CREATION_DATE