https://1library.org/document/q5mg8j3j-workpresentedinpartialfulfillmentoftherequirementsforthedegreeofbachelorincomputerscienceadvisor-prof-dr-manuelmenezesdeoliveiranetoportoalegrejuly-sceneconversionforphysically-basedrenderers-universidadefederaldoriograndedosulinstitutodeinformáticacursode.html