9

mental ray Sun & Sky 1315
Procedure
To use mental ray Sun & Sky:
1.
Make sure mental ray (page 3–78) is the active
renderer.
2. From the C reate menu, choose Lights >
Daylight System.
Yo u c a n a l s o f i n d D a y l i g h t S y s t e m o n t h e C r e a t e
menu under Systems.
Note: The Daylight System is also available from
Create panel > Systems, but if you go that route
you’re not prompted to turn on Logarithmic
Exposure control (see next step), so when using
Sun & Sky it’s best to make a habit of choosing
DaylightSystemfromtheCreatemenu.
3. You ’re prompted to activate Logarithmic
Exposure Control with the Exterior Daylight
Flag, if b oth are not already active. Click Yes
to do so automatically.
4. Create a Daylight system in the Perspective (or
a Camera) viewport: Drag and release to create
the compass rose, move the mouse to p osition
the light, and then click to place the light and
finish creating the system.
5. Go to the Modify panel, and on the
DaylightParametersrollout,setSunlighttomr
Sun and Skylight to mr Sky.
6. WhenyouchoosemrSky,you’repromptedto
add a mr Physical Sky environment map. Click
Ye s t o d o s o .
The parameters rollouts for mr Sun and mr Sky
now appear on the Modify p anel.
7. Open the Environment dialog (page 3–272)
(press
8 ) and make sure Common Parameters
>EnvironmentMapissettomrPhysical
Sky, Exposure Control (page 3–293) is set
to Logarithmic Exposure Control, and
Logarithmic Exposure Control Parameters has
Exterior Daylight on.