2012

Table Of Contents
Sky Background
The option to choose the sky background is only available when the lighting
unit is photometric (the LIGHTINGUNITS system variable is set to 1 or 2). If
you choose the sky background and change the lighting to standard (generic)
lighting (the LIGHTINGUNITS system variable is set to 0), the sky background
is disabled.
The sun and sky background can be interactively adjusted in a view that can
be activated in the Sun Properties window by clicking the first button in the
title bar of the Sky Properties. This button activates the Adjust Sun & Sky
Background dialog box. Here you can change properties and preview the
changes to the background.
Sky Illumination
The view can have a sky background or a sky background and illumination.
This option is in the Sky Properties Status drop-down list in the Sun Properties
window. Additional sky illumination adds extra light to the scene, simulating
the effect of light scattered by the atmosphere throughout the scene. This
additional light is only visible in rendered output when final gather is enabled.
This can be found in the Advanced Render Settings palette.
NOTE The default final gather setting of Auto enables final gather in rendering
when sky illumination is turned on.
View
The VIEW command provides a mechanism for creating and managing named
views. The sun and sky background can be assigned to a new named view
under Background. The sky background relies on the sun data in the named
view.
You can adjust sun and sky background interactively in a view in the Adjust
Sun & Sky Background dialog box. Click the first button in the title bar of the
Sky Properties. This button activates the Adjust Sun & Sky Background dialog
box. Here you can change properties and preview the changes to the
background.
To turn the sun on and off in a drawing
1 Click Render tab Lights panel Lighting Units drop-down
Generic Lighing Units.
No lighting units are used and standard (generic) lighting is enabled.
Sun and Sky Simulation | 2195