2009

NOTE The beam angle is similar to the hotspot angle for standard lights, but all
of a hotspot is at 100 per cent intensity. The field angle is similar to the falloff
angle for standard lights, but at the falloff angle, intensity fades to zero;
photometric lights use a smoother curve, so some light might be cast outside the
field angle.
You can manipulate the beam angle and field angle by dragging manipulators
in viewports, as described in the previous procedures, and the later section
"Manipulators for Spotlights."
You can also adjust beam and field angles in a Light viewport (looking at the
scene from the point of view of the spotlight).
Manipulators for Spotlights
Manipulators are visible and usable while the Select And Manipulate
button
on page 2613 is turned on. This button is on the default main toolbar
on page 7499. When you move the mouse over a manipulator, the manipulator
turns red to show that dragging or clicking it will have an effect. Also, a tooltip
appears, showing the name of the object, the parameter, and its value.
TIP When you select multiple spotlights, all their manipulators are accessible.
For more information on using the spotlight manipulators, see the Procedures
section at the top of this topic.
Beam manipulator: In a viewport, drag the beam circle to adjust the beam
value.
Field manipulator: In a viewport, drag the field circle to adjust the field value.
The beam and field angles constrain each other, as their spinner controls do.
Standard Lights
Standard lights are computer-based objects that simulate lights such as
household or office lamps, the light instruments used in stage and film work,
and the sun itself. Different kinds of light objects cast light in different ways,
simulating different kinds of real-world light sources. Unlike photometric
lights
on page 5005, standard lights do not have physically-based intensity
values.
Standard Lights | 5049