9

1320 Chapter 15: Lights and Cameras
Inter face
mr Su n Basic Parameters rollout
On—Tur ns the mr Su n l ight on a nd off.
Default=on.
Targeted—Applicable only when you add an mr
Sun light directly to the scene via Create panel
> Lights > Photometric, rather than as part of a
Daylight system (page 1–418).Whenon,thelight
is targeted and you can change the target distance
by moving the target. The distance between the
light and its target is displayed to the right of
the check box. When off, you can set this value
directly. Default=on.
Shadows group
On—Toggles shadow ing for the lig ht. Default=on.
Softness—The softness of shadow edges. The
default value of 1.0 accurately matches the softness
of real solar shadows. Lower values make the
shadows sharper and higher va lues make them
softer.
Softness—Thenumberofshadowsamplesforthe
soft shadows. If it is set to 0, no soft shadows are
generated. Default=8.
mr Sun Parameters rollout
Multiplier—Ascalarmultiplierforthelightoutput.
Default=1.0.
Inher it from mr Sk y—Uses the equivalent settings
from the mr Sky Parameters rollout for the
remaining mr Sun Parameters rollout settings.
Default=on.
For further information, see Common Parameters
(page 2–1316)
Haze—The amount of particulate matter in the air.
Possible values range from 0.0 (a completely clear
day) to 15.0 (extremely overcast, or a sandstorm in
the Sahara). Default=0.0.
For details, see Haze.
Height—The vertical position of the horizon.
Default=0.0.
For details, see Horizon Height.
Non-Physical Tuning group
Red/B lue Tint—Provides artistic control over the
redness of the sky lig ht. The default value of 0.0
is the physical ly correct value (calculated for a
6500K whitepoint), but can be changed with this
parameter, which ranges from -1.0 (extremely
blue) to 1.0 (extremely red).
Saturation—Provides artistic control over
saturation of the sky light. The default value of