Importance Introduction
of the night sky Ambiance of night scenes Applications
Films, planetarium shows, simulators, games
Sources of Illumination (W/m2)
Sun Moon Stars 103 10-3 10-8 Zodiacal light Airglow Cosmic light Dim misc. 10-7 10-8 10-10 10 -8 10-9
Model Overview
Moon Position
~ 59% of the Moon is visible from the Earth Rotates around itself at the same speed as around the Earth Elliptical orbit
Modeling the Moon
Geometric model
Albedo map Elevation map
Data from the Clementine project
Illuminated by
Sun (black body) Earth (earthshine)
BRDF
BRDF Specialized of the Moon
Low albedo (7%) Reddish color Backscattering (much brighter at full moon) Photo by No limb darkening Antonio (uniform disc at full moon) Cidadao
Constant across the surface We decouple BRDF, spectral properties and albedo
Low Moon over cityscape
Close-up of rendered stars
Fish-eye view of a clea...