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   ocr: Read material files Difuse: and specular retiectance Emission and excitation spectra Determine. light source properties Predetined light sources: CIE illuminants D65 and A Measured. fcorescent, UV: Easily extendable: Determine scenet adiances: : Single scattering, event (local llumination) Determine the contrbution from reflected light as the product of the spectral pover distrabutions of the ight andi the: spectral reflectances Determine. the contribution, if any, from Suorescence, based upon exciation and emission spectra, and current light source. Total scene radiances are: sum of refiected ...