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Center

Courtesy of Miguel Angel Bermudez 

 


The Physical Sky system in Maxwell Render uses a novel approach, offering a wide range of real-life and physically correct parameters to control the look of the sky and the subsequent lighting in the scene. Results range from common Earth values to exaggerated fantasy skies. Users can create pre-sets of sky settings to quickly load a new sky, or share their pre-sets with other users. It’s also possible to save the current sky as an HDR map.

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Left: Default settings (0.04)                                      Center: Turbidity 0.65, Scatt Asymmetry 0.7                Right: Turbidity 0.65, Scatt Asymmetry -0,7

 

Tip

Note: Very high Turbidity Coefficient values such as 0.5 are also possible for very dense aerosol atmospheres, for example after a volcano eruption.

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• X: The X coordinate of the sun direction vector.
• Y: The Y coordinate of the sun direction vector.
• Z: The Z coordinate of the sun direction vector.

 


 

 



Tip

Tips for working with the Physical Sky:

  • Keep in mind that the atmosphere parameters influence each other. For example, if you raise the Turbidity Coefficient (more particles in the atmosphere), the Wavelength Exponent, Reflectance and Scattering Asymmetry parameters will then have a greater influence on the look of the sky: they are affecting a larger amount of particles.
  • To keep the horizon from turning too bright, lower the Planet Reflectance and decrease the Scattering Asymmetry.
  • Maxwell Studio and some of the plug-ins can interactively show an accurate OpenGL view of the current sky coloration and brightness. In Studio, press the “K” key to activate/ deactivate the Sky Preview. This OpenGL view also takes into account the cameras’ f-Stop, ISO and Shutter Speed settings.
  • The scene illumination and coloring change depending on what sky settings you use. If you raise the ozone level, which makes the sky scatter more blue light, your entire scene will have a bluer illumination.

 

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