6 modules - PI-VR GmbH

8.1 Truelight Materialsquality yields higher generation times for the environment but might be necessaryin precomputed illumination mode with animated sun.» Flip Inside Out: Flips the normals of the object this material is assigned to.» Emit Caustics; Activates/deactivates Emit Caustics. Allows the HDR to emit caustics.Only supported in FullGI illumination mode with caustics.» Is Visible: Sets the light source to on by default.» Use as Lightsource: Uses the HDR as light source. Only supported in FullGIillumination mode.» Use as Default Environment: Selects current environment as default for newlycreated TrueLight materials (see materials’ Common Settings).» Show Compass: Displays a compass in the render window for the currently selectedskylight material. The compass is positioned at the environment’s centerand oriented according to the environment rotation (see Transformation).» Sky and Sun» Sky Model: Choose between two different sky models: ’Realistic’ and ’Artistic’.The artistic sky model produces more reddish and colorful skies, especially forsunrise/sunsets.» Exposure: Sets the HDR-Image’s exposure level. The higher the exposure level,the longer will be the series of shutter cycles which will be used to calculate theimage’s light intensity.» Sky Turbidity: Controls the amount of haze in the atmosphere. Low values correspondto a clear sky. The default value of 3.0 is a clear sky in a temperateclimate. The maximum value of 10.0 yields a hazy sky.» Sun Scale: Controls the size of the sun. The default value 1.0 corresponds tothe real size of the sun, seen from the earth. The sun is drawn as a filled circlewithin the sky environment. Increase the sun scale to get softer shadows withray tracing.» Use Mirrored Sky as Ground: The mirrored upper hemisphere (sky without sun)is used as lower hemisphere (ground).225