2009
mr Sky Portal
Create panel > Lights > Photometric > mr Sky Portal
Create menu > Lights > Photometric > mr Sky Portal
The mr (mental ray) Sky Portal object provides an efficient method of
“gathering” existing sky lighting in interior scenes without requiring high
final gather or global illumination settings that would result in excessively
long render times. In effect, a portal acts as an area light that derives its
brightness and coloring from the environment.
IMPORTANT For mr Sky Portal to work correctly, the scene must contain a Skylight
component. This can be an
IES Sky light on page 5157, an mr Sky light on page 5176,
or a
Skylight on page 5065.
Procedures
Example: To use the mr Sky Portal object:
1 Make sure mental ray is the
active production renderer on page 6135.
2 Create a scene with a windowed interior. Set up a camera in the interior
and set a viewport to show the camera view.
3 Add a Daylight system:
1 Create menu > Systems > Daylight System. When prompted use the
mr Photographic Exposure Control, click Yes.
5186 | Chapter 18 Lights and Cameras