2009

IMPORTANT Don't forget to turn on Enable Final Gather when using Sun
& Sky, since the skylight is a form of indirect light, which can be rendered
only with the help of Final Gather. If this is not done, Sun shadows will be
unnaturally dark or black rather than bluish, as they should be.
9 Render with Sun & Sky. To specify different times, dates, and locations
in the Daylight system for different effects, use the Motion panel > Control
Parameters settings or turn on Manual Override to place the sun by hand.
TIP Adjust the Brightness and Contrast of the Logarithmic Exposure Control
for a pleasing image.
To see the sun and sky in the viewport:
The ability to display the mental ray Sun & Sky solution in the viewport lets
you adjust parameters interactively, so that you can visualize the results
immediately without having to render. Keep in mind, though, that the
viewport representation is an approximation of the final result, so you’ll still
need to render while fine-tuning the settings.
Sunlight and Daylight Systems | 5167