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This Time Only
Selecting this checkbox makes the pre-roll use this current frame only and not the
previous frames.
Preroll Frames
This determines the number of frames to pre-roll.
Lock RGBA
When selected, this checkbox allows the Gain of the color channels to be controlled
independently. This allows for tinting of the Trails effect.
Gain
The Gain control affects the overall intensity and brightness of the image in the buffer. Lower
values in this parameter create a much shorter, fainter trail, whereas higher values create a
longer, more solid trail.
Rotate
The Rotate control rotates the image in the buffer before the current frame is merged into the
effect. The offset is compounded between each element of the trail. This is different than each
element of the trail rotating on its pivot point. The pivot remains over the original object.
Offset X/Y
These controls offset the image in the buffer before the current frame is merged into the effect.
Control is given over each axis independently. The offset is compounded between each
element of the trail.
Lock Scale X/Y
When selected, this checkbox allows the X- and Y-axis scaling of the image buffer to be
manipulated separately for each axis.
Scale
The Scale control resizes the image in the buffer before the current frame is merged into the
effect. The size is compounded between each element of the trail.
Lock Blur X/Y
When selected, this checkbox allows the blurring of the image buffer to be controlled
separately for each axis.
Blur Size
The Blur Size control applies a blur to the trails in the buffer before the current frame is merged
into the effect. The blur is compounded between each element of the trail.
Apply Mode
The Apply Mode setting determines the math used when blending or combining the trailing
objects that overlap.
Normal: The default mode uses the foreground object’s Alpha channel as a mask to
determine which pixels are transparent and which are not. When this is active, another
menu shows possible operations, including Over, In, Held Out, Atop, and XOr.
Screen: Screen blends the objects based on a multiplication of their color values. The
Alpha channel is ignored, and layer order becomes irrelevant. The resulting color is
always lighter. Screening with black leaves the color unchanged, whereas screening
with white always produces white. This effect creates a similar look to projecting
several film frames onto the same surface. When this is active, another menu shows
possible operations, including Over, In, Held Out, Atop, and XOr.
Dissolve: Dissolve mixes overlapping objects. It uses a calculated average of the
Chapter – 88 Effect Nodes 1963