Adobe 12040118 - After Effects Standard Tutorial page 503

blending.
Note: If you see edge tearing in the image, try increasing the Error Threshold for more blending. If the image has heavy grain, try decreasing the
Error Threshold so the low-level motion of the grain is ignored.
Block Size Adjusts the size of the blocks used to calculate the vectors.
Weighting Controls the weighting of the red, green, and blue channels in calculations used to analyze the image. For example, setting Red
Weight and Green Weight to zero means that only the blue channel is analyzed for motion.
Motion Blur controls
Shutter Angle Determines the intensity of motion blur. The shutter angle is measured in degrees, simulating the exposure caused by a rotating
shutter. Simulated exposure time is determined by dividing the shutter angle by the frame rate times 360°. For example, a shutter angle of 90°
causes an exposure of 1/96 of a second per frame: 90° / (360° * 24 fps).
Shutter Samples Controls the quality of the motion blur. A higher value results in a smoother motion blur.
Matte, warp, and crop controls
Matte Layer The layer to use as a matte for defining the foreground and background areas of the image. White areas in the matte represent the
foreground, black areas represent the background, and gray attenuates between foreground and background.
Matte Channel The channel to use as a matte.
Warp Layer Allows you to warp the layer to which the effect is applied by applying the motion vectors from the layer that you choose.
Show Controls the portion of the layer to be time-remapped.
Source Crops If the image contains unwanted pixels or artifacts at the edges, use Source Crops controls to specify image boundaries. Pixels
from the boundaries are repeated to fill the area beyond the boundaries to the edges of the layer.
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