2009

Interface
Diffuse Horizontal Illuminance The illuminance of the sky measured by a
luminance meter placed horizontally, outdoors, excluding the contribution
from the sun. Default=10000.0 lx.
You can animate this value.
Direct Normal Illuminance The illuminance of the sun measured by a
luminance meter aimed directly at the sun. Default=10000.0 lx.
You can animate this value.
Overcast Sky (The default.) Specifies an overcast sky.
Clear Sky Specifies a clear sky.
NOTE If you have chosen American units as the active lighting units, the
illuminance values appear as footcandles (fc) rather than lux (lx).
mr Physical Sky
Daylight system > Modify panel > Daylight Parameters rollout > Skylight
drop-down list > mr Sky > Confirm prompt.
The mr Physical Sky shader is intended primarily for use in the mental ray
Sun & Sky combination. This topic mainly provides information on parameters
unique to this component. A number of mr Physical Sky parameters are
common to all three Sun & Sky components. For some of those parameters,
this topic provides a brief explanation plus a link to the main topic with
additional details.
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.
Sunlight and Daylight Systems | 5181