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Swirl creates a vortex warp on the terrain. It can be very useful for adding a fluid look to the terrain.

Node Properties
DegreesThe strength of the vortex. Negative values move the distortion clockwise; positive values move the distortion counter-clockwise.
ScaleThe size of the swirl.
X / YThe location of the swirl center. Can only be used if the Scale is less than 1.0.