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  2. Okta - Wikipedia

    en.wikipedia.org/wiki/Okta

    Sky conditions are estimated in terms of how many eighths of the sky are covered in cloud, ranging from 0 oktas (completely clear sky) through to 8 oktas (completely overcast). In addition, in the SYNOP code there is an extra cloud cover indicator '9' indicating that the sky is totally obscured (i.e. hidden from view), usually due to dense fog ...

  3. Diffuse sky radiation - Wikipedia

    en.wikipedia.org/wiki/Diffuse_sky_radiation

    It is also called sky radiation, the determinative process for changing the colors of the sky. Approximately 23% of direct incident radiation of total sunlight is removed from the direct solar beam by scattering into the atmosphere; of this amount (of incident radiation) about two-thirds ultimately reaches the earth as photon diffused skylight ...

  4. Brian Fair - Wikipedia

    en.wikipedia.org/wiki/Brian_Fair

    The sixth studio album from Shadows Fall, titled Retribution, was released on September 15, 2009, and the seventh, titled Fire From the Sky, on May 15, 2012. In December 2021, when asked by the Podioslave Podcast if there will be new music from Shadows Fall, Fair said, "We've talked about writing stuff, and there's a very definitive Shadows ...

  5. Overcast - Wikipedia

    en.wikipedia.org/wiki/Overcast

    Overcast or overcast weather, as defined by the World Meteorological Organization, is the meteorological condition of clouds obscuring at least 95% of the sky. [1] However, the total cloud cover must not be entirely due to obscuring phenomena near the surface, such as fog .

  6. Daylight - Wikipedia

    en.wikipedia.org/wiki/Daylight

    World map showing the areas of Earth receiving daylight around 13:00 UTC in April. Daylight is the combination of all direct and indirect sunlight during the daytime.This includes direct sunlight, diffuse sky radiation, and (often) both of these reflected by Earth and terrestrial objects, like landforms and buildings.

  7. Ambient occlusion - Wikipedia

    en.wikipedia.org/wiki/Ambient_occlusion

    The ambient occlusion map (middle image) for this scene darkens only the innermost angles of corners. In 3D computer graphics, modeling, and animation, ambient occlusion is a shading and rendering technique used to calculate how exposed each point in a scene is to ambient lighting. For example, the interior of a tube is typically more occluded ...

  8. Shadow - Wikipedia

    en.wikipedia.org/wiki/Shadow

    If there is more than one light source, there will be several shadows, with the overlapping parts darker, and various combinations of brightnesses or even colors. The more diffuse the lighting is, the softer and more indistinct the shadow outlines become until they disappear. The lighting of an overcast sky produces few visible shadows.

  9. Kerkythea - Wikipedia

    en.wikipedia.org/wiki/Kerkythea

    Kerkythea is a standalone rendering system that supports raytracing and Metropolis light transport, uses physically accurate materials and lighting, and is distributed as freeware.