Apple Motion 4 - Manual (Page 1016)

Bloom
This filter simulates the effect of extremely overexposed highlights on film. Highlights
above a certain threshold are blurred, brightened, and recomposited with the original.
All unaffected regions of the image interact with the glow effect, but otherwise retain
their detail.
Original image Bloom applied
Parameters in the Inspector
Amount: Sets the amount of the bloom.
Brightness: Sets the brightness of the bloom.
Threshold: Sets the luminance threshold at which the bloom starts.
Horizontal: Sets the amount of horizontal bloom.
Vertical: Sets the distance of vertical bloom.
Crop: Sets whether or not the bloom is cropped at the original boundaries of the object.
Mix: Sets what percentage of the original image is blended with the filtered image.
HUD Controls
The HUD contains the following controls: Amount, Brightness, and Threshold.
1016 Chapter 16 Using Filters