Eyeon:Manual/Tool Reference/Creator/Day Sky
From VFXPedia
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Creator Tools |
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Day Sky |
Day Sky [DS] | |
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The DaySky generator is a practical implementation of the research paper "A Practical Analytical Model for Daylight" by Preetham, Shirley, and Smits. A copy of the original paper can be found at the website for the Visual Simulation Group at the University of Utah. This tool aims to produce a simulation of the daylight produced at a specific time and location on the earth, and generate a high dynamic range image which represents a map of that light. It is not a sky generator, although it could be combined with a cloud generator or noise tool to produce one. |
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Image Tab
See the Creator Common Controls section at the beginning of this chapter for a description of the controls under this tab.
Controls Tab
Use these sliders to specify the Latitude and Longitude used to create the Day Sky simulation.
Use these controls to specify the Day, Month and Time for the DaySky simulation.
Turbidity causes light to be scattered and absorbed rather than transmitted in straight lines through the simulation. Increasing the turbidity will give the sky simulation a murky feeling, as if smoke or atmospheric haze were present.
Deselect this checkbox to disable any tone mapping applied to the simulation. Since the simulation is calculated in 32 bit floating point color space, it generates color values well above 1.0 and well below 0.0. Tone Mapping is a process that takes the full dynamic range of the resulting simulation and compresses the data into the desired exposure range while attempting to preserve as much detail from the highlights and shadows as possible.
Generally this option should only be deselected if the resulting image will later be color corrected as part of a floating point color pipeline.
Use this control to select the exposure used for Tone Mapping.
Advanced Tab
Use this control to adjust the brightness of the horizon relative to the sky.
Use this control to adjust the width of the gradient seperating the horizon from the sky.
Use this control to adjust the intensity or brightness of the sky nearest to the sun.
Use this control to adjust the width or size of the area in the sky affected by the sun.
Use this control to increase or decrease the amount of backscatter light in the simulation.
Tips for Day Sky (edit)
EyeonTips:Manual/Tool Reference/Creator/Day Sky
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