8

1168 Chapter 15: Lights and Cameras
Intensity/Color/Distribution Rollout (page
2–1197)
Procedure
To create a light with an I sotropic distribution:
1.
OntheCreatepanel,clickLights.
2. Choose Photometr ic from the drop-down list.
(The default is Standard.)
3. IntheObjectTyperollout,selectFreePoint.
4. In the Intensity/Color/Distribution rollout,
select Isotropic from the Distribution list.
5. Click in a v iewport to position the light.
The light is now part of the scene.
6. Set the creation parameters.
You can use the Move t ransform to adjust t he
light.
You c an also use the
Place Highlig ht (page
1–452)
command to change a light’s position.
Diff use Distr ibution (Photometr ic
Lights)
Create panel > Lights > Photometric Lights > Click
Target Line ar, Free Linear, Target Area, or Free Area. >
Intensity/Color/Di
stribution rollout > Choose Diffuse in
Distribu tion list. > Clic k in viewport to create light.
Diffuse distribution emits light f rom a surface.
Light that leaves the
surfaceatarightangleis
at the light’s greatest intensity. A t increasingly
oblique angles, the intensity of t he emitted light
diminishes.
Spotlight Distr ibution
(Photometr ic Lights)
Create panel > Lights > Photometric Lights > Click Target
Point or Free Point. > Intensity/Color/Distribution rollout
> C hoose Spotlight in Distribution list. > Click in viewport
to create light.
A spotlight distribution casts a focused b eam of
light like a flash lig ht, a follow spot in a theater or a
headlight. At the light’s
beam angle, intensit y has
fallen to 50 per cent. At its
field angle, intensity
has fallen to zero. ( The beam ang le is similar to
thehotspotangleforstandardlights,butallofa
hotspot is at 100 per cent intensity. The field angle
is comparable to the falloff angle for standard
lights.)
Spotlight distribution
Icon for Target Point light with spotlight distribution
See also
Lights (page 2–1126)
Target Point Light (Photometric) (page 2–1157)
Free Point Light (Photometric) (p age 2–1158)