000135350 001__ 135350 000135350 005__ 20240522124406.0 000135350 0247_ $$2doi$$a10.1111/cgf.15009 000135350 0248_ $$2sideral$$a138626 000135350 037__ $$aART-2024-138626 000135350 041__ $$aeng 000135350 100__ $$0(orcid)0000-0002-5323-3233$$aMonzón, Néstor$$uUniversidad de Zaragoza 000135350 245__ $$aReal-Time Underwater Spectral Rendering 000135350 260__ $$c2024 000135350 5060_ $$aAccess copy available to the general public$$fUnrestricted 000135350 5203_ $$aThe light field in an underwater environment is characterized by complex multiple scattering interactions and wavelength‐dependent attenuation, requiring significant computational resources for the simulation of underwater scenes. We present a novel approach that makes it possible to simulate multi‐spectral underwater scenes, in a physically‐based manner, in real time. Our key observation is the following: In the vertical direction, the steady decay in irradiance as a function of depth is characterized by the diffuse downwelling attenuation coefficient, which oceanographers routinely measure for different types of waters. We rely on a database of such real‐world measurements to obtain an analytical approximation to the Radiative Transfer Equation, allowing for real‐time spectral rendering with results comparable to Monte Carlo ground‐truth references, in a fraction of the time. We show results simulating underwater appearance for the different optical water types, including volumetric shadows and dynamic, spatially varying lighting near the water surface. 000135350 536__ $$9info:eu-repo/grantAgreement/ES/AEI/PID2022-141539NB-I00$$9info:eu-repo/grantAgreement/ES/MCIN/AEI/10.13039/501100011033 000135350 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttp://creativecommons.org/licenses/by-nc/3.0/es/ 000135350 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000135350 700__ $$0(orcid)0000-0002-7503-7022$$aGutierrez, Diego$$uUniversidad de Zaragoza 000135350 700__ $$aAkkaynak, Derya 000135350 700__ $$0(orcid)0000-0002-8160-7159$$aMuñoz, Adolfo$$uUniversidad de Zaragoza 000135350 7102_ $$15007$$2570$$aUniversidad de Zaragoza$$bDpto. Informát.Ingenie.Sistms.$$cÁrea Lenguajes y Sistemas Inf. 000135350 773__ $$g(2024), 11 pp.$$pComput. graph. forum$$tComputer Graphics Forum$$x0167-7055 000135350 8564_ $$s712940$$uhttps://zaguan.unizar.es/record/135350/files/texto_completo.pdf$$yVersión publicada 000135350 8564_ $$s2411724$$uhttps://zaguan.unizar.es/record/135350/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000135350 909CO $$ooai:zaguan.unizar.es:135350$$particulos$$pdriver 000135350 951__ $$a2024-05-22-10:17:43 000135350 980__ $$aARTICLE