mental ray Architectural and Design Visualization Shader Library

64 3 Sun and SkyThe most important common parameters are those that drive the entire shading- andcolorization model:• haze sets the amount of haze in the air. The range is from 0 (a completely clear day)to 15 (extremely overcast, or sandstorm in Sahara). The haze influences the intensityand color of the sky and horizon, intensity and color of sunlight, softness of the sunsshadows, softness of the glow around the sun, and the strength of the aerial perspective.Haze=0Haze=3Haze=8Haze=15• redblueshift gives artistic control over the “redness” of the light. The default valueof 0.0 is the physically correct value 2 , but can be changed with this parameter whichranges from -1.0 (extremely blue) to 1.0 (extremely red).Redness=-0.32 Calculated for a 6500K whitepoint.Redness=+0.3