2009

mr Physical Sky is visible, but no lighting is present in the scene.
These lights are meant to be used together: mr Sun and mr Sky appear within
the 3ds Max Daylight system on page 5139. When used in combination, this
solution is called Sun & Sky.
TIP You can view the Sun & Sky combination in a viewport, which makes adjusting
parameters fully interactive. For details, see
this procedure on page 5167.
NOTE Sun & Sky is a true high-dynamic range photometric lighting system that
requires the
mr Photographic Exposure Control on page 6744 to be enabled. In
some of the mental ray
rendering presets on page 6114, such as those starting with
mental.ray.daylight, this is done automatically. Also, when you add a Daylight
System from the Create menu, you have the option to activate the exposure control
automatically.
Using Sun & Sky with SSS Materials
To use a mental ray
fast SSS material on page 5693 together with the
high-dynamic range Sun & Sky solution, be sure to turn on Scatter Indirect
Illumination on the material's Advanced Options rollout so that the material
can scatter the skylight, which is considered indirect.
Sunlight and Daylight Systems | 5163