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1341

Web Distribution (Photometric Lights) 1325

axis. However, you can select and move the

target object as well as the light itself. When you

move either the l ight or the target, the light’s

orientation changes so it always points at the

target.

Yo u c a n u s e t h e Place Highlight (page 1–467)

command to change a light’s position. Another

waytoadjustaspotlightistouseaLight

viewport (page 3–750).

To select the target:

If the spotlight distribution is on a target p oint

light, you can move the target to adjust the

direction of the spot light. The target, displayed as

asmallsquare,isofteninthesameareaasobjects

that you want to illuminate. It can be difficult to

select it by clicking.

1. Firstselectthespotlightitself.

2. Right-click the light and choose Select Target

from the pop-up menu. Clicking the line that

connects the light and its target selects both

objects.

To change a v iewport to a light view:

Right-click the viewport label.

The Viewport Right-Click menu is displayed.

2. Choose Views.

The name of each light is displayed in the Views

list. By default, photometric lights are named

Point01, Point02, and so on.

3. Choosethenameofthelightyouwant.

Theviewportnowshowsthelight’spointof

view. You can use the Light V iewport Controls

(page 3–750) to adjust the light.

The default keyboard shortcut for Light

viewports is $.

Web Distribution (Photometric

Lights)

AWebdistributionusesaphotometric web

definition (page 2–1326) to distribute the light.

A photometric web is a 3D representation of

the light intensity distribution of a light source.

Web definitions are stored in files. Many lighting

manufacturers provide web files that model their

products; these are often available on the Internet.

AwebfilecanbeintheIES (page 2–1328), LT LI

(page 3–964),orCIBSE (page 3–921) format.

Controls for assigning the web file are on the Web

Parameters rollout.

Example of web distribution

Various web distributions