Add or delete individual lights, Adjust light properties, Position lights – Adobe Photoshop CS4 User Manual
Page 596: Add light guides
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USING PHOTOSHOP CS4
3D and technical imaging
Last updated 1/10/2010
For a video about adjusting 3D lights, see
five-minute mark.)
Add or delete individual lights
❖
In the 3D panel, do either of the following:
•
To add a light, click the Create A New Light button
, and choose the light type (point, spot, or infinite).
•
To delete a light, select it from the list at the top of the Lights section
. Then click the Delete button
at
the bottom of the panel.
Adjust light properties
1
In the Lights section
of the 3D panel, select a light from the list.
2
(Optional) To change the light type, select a different option from the first pop-up menu in the lower half of the
panel.
3
Set the following options:
Intensity
Adjusts brightness.
Color
Defines the color of the light. Click the box to access the Color Picker.
Create Shadows
Casts shadows from foreground surfaces onto background surfaces, from a single mesh onto itself
or from one mesh onto another. Disabling this option improves performance slightly.
Softness
Blurs the edge of shadows, producing a gradual falloff.
4
For point or spot lights, set the following options:
Hotspot
(Spot lights only) Sets the width of the bright center of the light.
Falloff
(Spot lights only) Sets the outer width of the light.
Use Attenuation
Inner and Outer options determine the cone of attenuation and how fast light intensity decreases
as distance from objects increases. When an object is closer than Inner limit, light is full strength. When an object
is further that Outer limit, light is at zero strength. At intermediate distances, light attenuates linearly from full
strength to zero.
Hover the pointer over the Hotspot, Falloff, and Inner and Outer attenuation options. Red outlines in the icon to
the right indicate the affected light element.
Position lights
❖
In the Lights section
of the 3D panel, select any of the following:
Rotate tool
(Spot and infinite lights only) Rotates light while maintaining its position in 3D space.
Drag tool
(Spot and point lights only) Moves the light to a different position in the same 3D plane.
Slide tool
(Spot and point lights only) Moves the light to a different 3D plane.
Point Light at Origin
(Spot light only) Directs light at the center of the model.
Move to Current View
Places light in the same position as the camera.
Add light guides
Light guides provide spatial reference points for your adjustments. These guides reflect the type, angle, and attenuation
of each light. Point lights appear as a ball, spot lights as a cone, and infinite lights as a line.
❖
At the bottom of the 3D panel, click the Toggle Lights icon
.