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mr Physical Sky 1321

1.0 is the physically calculated satura tion level.

Possible values range from 0.0 (black and white) to

2.0 (extremely high saturation).

mr Sun Photons rollout

Use these settings to focus global-il lumination

photonsonanareaofinterest. Forexample,if

you’ve modeled a huge city as a backdrop, but are

rendering only a room interior, you probably don’t

want mental ray to shoot photons over the entire

cit y, with the result that only a few will find their

way into the room.

Use Photon Target—When on, uses the Radius

setting with respect to the light target.

Radius—Sets the radial distance f rom the target in

which the mr Sun casts GI photons.

mr P hy si ca l S ky

Daylight system > Modify panel > Daylight Parameters

rollout > Sk ylight drop-down list > mr Sk y > Confirm

prompt.

The mr Physical Sky shader is intended primarily

for use in the men tal ray Sun & Sky combination.

This topic mainly provides information on

parameters unique to this componen t. A number

of mr Physical Sky par ameters are common to all

three Sun & Sky components. For some of those

parameters, this topic provides a brief explanation

plus a lin k to the main topic with additional details.