Adobe AFTER EFFECTS CS3 PROFESSIONAL User Manual page 375

To show the depth of an object in the Info panel, click the object in the Composition panel or Layer panel using the
Selection tool while the effect is selected.
How much blur is applied to objects outside the focal plane.
Maximum Radius
Determines what depths are in focus on either side of the focal plane.
Focal Plane Thickness
The higher the value, the more quickly elements drop out of focus with increasing distance from the focal
Focal Bias
plane.
See also
"About 3D layers" on page 174
Fog 3D effect
The Fog 3D effect simulates fog by behaving as though there is a scattering medium in the air that makes objects look
more diffuse as they get more distant along the z axis.
This effect works with 8-bpc color.
Original (top left), Gradient Layer (bottom left), and with Fog 3D applied (bottom right)
Where along the z axis the diffuse scattering begins.
Fog Start Depth
To determine the depth of an object, click it in the Composition panel or Layer panel using the Selection tool while
the effect is selected.
Where along the z axis the diffusion reaches its maximum.
Fog End Depth
Determines how quickly the scattering occurs. The higher the value, the more dense the fog
Scattering Density
appears from its starting point.
Creates a foggy background (default). Deselect to create transparency at the back of the 3D scene
Foggy Background
for compositing on top of another layer.
(Optional) A grayscale layer to use as a control layer, the luminance values of which apply to fog
Gradient Layer
density. For example, use the Fractal Noise effect to create a swirling control layer for atmospheric fog. Make sure
that the dimensions of the gradient layer are at least as great as the dimensions of the 3D scene layer.
How much the gradient layer affects the fog density.
Layer Contribution
AFTER EFFECTS CS3 369
User Guide