2009

Haze-Driven Sky Model
Create a Daylight system. > Choose mr Sky as the sky light. > Choose Haze
Driven as the sky model. > mr Sky: Haze Driven rollout
This sky model uses a Haze value to specify the amount of water vapor or
other 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). The Haze
value influences the intensity and color of the sky and horizon, the intensity
and color of sunlight, the softness of the suns shadows, the softness of the
glow around the sun, and the strength of the aerial perspective.
NOTE The Haze-Driven sky model was the only sky model available in versions
prior to Autodesk 3ds Max 2009.
Interface
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.
You can animate this value.
Perez All-Weather Sky Model
Create a Daylight system. > Choose mr Sky as the sky light. > Choose Perez
All Weather as the sky model. > mr Sky: Perez Parameters rollout
The Perez All-Weather sky model is a physically accurate sky model recognized
as an industry standard. It is controlled by two
illuminance on page 8009 values.
NOTE The Perez model is suitable for daytime, but not for twilight or night scenes.
For scenes where the sun is low or absent, use the Haze model, or the CIE model
if you are concerned with photometric accuracy.
When you render while the Perez sky model is active, the sky color derives
from the Haze value in the mr Physical Sky shader on page 5181. By default this
Sunlight and Daylight Systems | 5179