Aura
Adds highly stylized light or dark halos around well-defined areas of an image. The resulting glow appears solarized, and the underlying image creates outlines that show through the glow effect.
Adjust this filter using the parameter controls in the Filters Inspector:
Inner Radius: Sets the amount the aura extends inward from its point of origin.
Outer Radius: Sets the amount the aura extends outward from its point of origin.
Brightness: Sets the brightness of the aura.
Clip to White: Any color channel exceeding the maximum value of 1 is clipped to 1.
Crop: Sets whether the filtered image is sharply cropped at its original boundaries. When this checkbox is deselected, the filter affects the edges of the image.
Mix: Sets the percentage of the original image to be blended with the filtered image.