All skymodel hillshades on this page were created by the
skymodelling algorithm of the raster chunk processing software, using 2x vertical exaggeration, with a sun at elevation 45°, azimuth 335°. The centre of the image is at 54° 46′ north, 127° 17′ West.
At the top are the five basic lighting scenarios: the uniform sky, the clear sky, the overcast sky, the sharp sky and the turbid sky. Below those come the further 15 more complex skymodels that SkyLum can also produce.
For more about Skymodels, see
Kennelly and Stewart’s 2014 paper.
Type 1: CIE standard overcast sky, alternative form, steep luminance gradation toward zenith, azimuthal uniformity
Type 2: Overcast, steep luminance gradation and slight brightening towards the sun
Type 3: Overcast, moderately graded with azimuthal uniformity
Type 4: Overcast, moderately graded and slight brightening towards the sun
Type 5: Uniform luminance
Type 6: Partly cloudy, no gradation towards zenith, slight brightening towards the sun
Type 7: Partly cloudy, no gradation towards zenith, brighter circumsolor region
Type 8: Partly cloudy, no gradation towards zenith, distinct solar corona
Type 9: Partly cloudy, with obscured sun
Type 10: Partly cloudy, with brighter circumsolar region
Type 11: White-blue sky with distinct solar corona
Type 12: CIE standard clear sky, low illuminance turbidity
Type 13: CIE standard clear sky, polluted atmosphere
Type 14: Cloudless turbid sky with broad solar corona
Type 15: White-blue turbid sky with broad solar corona