Light Falloff adjusts
the angle of a light's
This button replaces the Zoom Region button when a light viewport
The light has a narrow
hotspot but a wide falloff area.
Making the falloff
even wider illuminates a larger area.
Click Light Falloff,
then move the mouse in the light viewport to make the falloff narrower
or wider (the falloff extents are shown in gray, the
hotspot is in
Hold down the Ctrl key while moving the mouse
to lock the initial angle separation of the hotspot and falloff
You can't adjust the
hotspot larger than the falloff, because that would change the falloff
value. Likewise, when you reduce the falloff, it stops at the hotspot
size (in both cases, separated by the
separation, specified on the Rendering
page of the Preferences dialog).
To override the separation
of the hotspot and falloff parameters and cause the parameters to
affect each other, hold down the Shift key.
For more information
on the hotspot and falloff parameters, see
Spotlight Parameters and
To change a light's falloff:
- Set up a Perspective viewport so you
can see the light in 3D space.
- Activate a Light viewport.
- Press H to
display the Select Object dialog. Select the light.
The light and its cones should be visible in
the Perspective viewport.
- Click (Light
The button highlights
when it is on.
- Drag in the Light viewport to change
the falloff angle.
The gray falloff cone
expands and contracts as you drag.
- Drag down to widen (increase) the falloff
angle and illuminate more of the scene.
- Drag up to narrow (decrease) the falloff
angle and illuminate less of the scene. As its angle decreases,
the falloff shrinks around the hotspot. By default, the falloff
cone can be no smaller than the hotspot cone.
- Hold down Shift as
you drag to override the default. This lets the hotspot cone decrease
in size as you decrease the size of the falloff cone.
- Hold down Ctrl as
you drag to lock the initial angle separation of the hotspot and
- Press Esc or
right-click to turn off the button.