9

1324 Chapter 15: Lights and Cameras
at the light ’s greatest intensity. At increasingly
oblique angles, the intensity of the emitted light
diminishes.
Spotl ight Distr i bution
(Photometr ic Lights)
Create panel > Lights > Photometric Lig hts > Click Target
Point or Free Point. > Intensity/Color/Distribution rollout
> Choose Spotlight in Distribution list . > Clic k in viewport
to create light.
A spotlight dist ribution casts a focused beam of
light like a flashlig ht, a follow spot in a theater or a
headlight. At the light’s beam angle, intensity has
fallen to 50 per cent. At its field angle, intensity
has fallen to zero. (The beam angle is simi lar to
the hotspot angle for standard lig hts, but all of a
hotspot is at 1 00 per cent intensity. The field angle
is comparable to the falloff ang le for standard
lights.)
Spotlight distribution
Icon for Target Point light with spotlight distribution
See also
Lights (page 2–1272)
Target Point Light (Photometric) (page 2–1303)
Free Point Light (Photometric) (page 2–1304)
Spotlight Parameters (page 2–1338)
Intensity/Color/Distribution Rollout (page 2–1352)
Procedures
To cr eate a light with a spotlight distr ibution:
1.
OntheCreatepanel,clickLights.
2. Choose Photometric from the drop-down list.
(Standard is the default.)
3. IntheObjectTyperollout,clickTargetPoint
or Free Point.
4. In the Intensity/Color/Distribution rollout,
select Spotlight from the Distribution list.
5. If you are creating a Target Point light, drag in
a viewport. The initi al point of the drag is the
locationofthelight,andthepointwhereyou
release the mouse is the location of the t arget.
If you are creating a Free Point light, click in a
Viewport to position the light.
The light is now part of the scene.
6. Set the creation parameters.
You can use the Move tr ansform to adjust the
light.
Yo u c a n a l s o u s e t h e Place Highlight (page
1–467) command to change a light’s position.
To adjust a target point spotlight:
1.
Select the lig ht.
2. UseMoveonthemaintoolbartoadjust
the light.
Becausethespotlightisalwaysaimedatits
target,youcan’trotateitaboutitslocalXorY