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1331

1318 Chapter 15: Lights and Cameras

the sun and sky only, and does not receive any

shadows.

Tip: Some sky models neglect the influence of

bounce light from the ground, assuming only the

sky is illuminating the scene. To comp are the

output of mr Sky with, for example, the IES Sky

light, set Ground Color to black.

Night Color—The minimum color of the sky: The

sky will never become darker than this value. It

can be useful for adding things like moon, st ars,

high-altitudecirruscloudsthatremainlitlong

after sunset, etc. As the sun sets and the sky

darkens, the contribution from Night Color is

unaffected and remains as the base light level.

Red/B lue Tint—Gives artistic control over the

rednessofthelight. Thedefaultvalueof0.0

isthephysicallycorrectvalue(calculatedfora

6500K whitepoint), but can be changed with t his

parameter, which ranges from -1.0 (extremely

blue) to 1.0 (extremely red).

Saturation—Also an artistic control, where 1.0

is the physical ly calculated saturation level. The

parameter ranges f rom 0.0 (black and white) to 2.0

(extremely boosted saturation).

mr S ky

Daylight system > Modify panel > Daylight Parameters

rollout > Skylight drop-down list > mr Sky

Create panel > Lights > Photometric > mr Sky

Create menu > Lights > Photometric Lights > mr Sky

The mr Sky lig ht 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 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.