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The Blur node diffuses sharp shapes and softens the terrain.

Node Properties
PowerThe strenght of the blur. For best speed, use high power and low iterations. Although you may see square artifacts with too high values.
IterationsThe number of blur iterations to be repeated. For best quality, use low power and at least 4 iterations.
SigmaThe sigma or radius of the Gaussian blur (Only available for Guassian Blur)
DirectionThe direction of the motion blur. (Only available for Motion Blur)
Fast : TODO
Gaussian : TODO
Radial : TODO
Motion : TODO
Smooth : TODO