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Spherical distortion

The Spherize filter can distort an image to simulate a reflection on a curved surface.

To apply the Spherize filter:

Select a paint object. Make a selection to limit the effect to an area. If you don’t make a selection, the filter affects the entire image.
Choose Image | Filter | Other | Spherize or use the Filter menu in the Properties bar.
Adjust the settings in the dialog box and click OK to apply the filter.

	Original paint object
	Spherize: Amount = 5
	Vignette option selected

Spherize options

Amount	The extent of the distortion. Type a number from 1 to 10 or drag the slider. A higher number simulates a stronger curve.
Projection Mode	The shape of the distortion. Select Spherical/Ellipsoid to simulate reflection on a spherical surface like a globe. Select Cylindrical to simulate reflection on a cylinder, such as a can. Select Horizontal to make cylindrical distortion horizontal. Select Vertical to make cylindrical distortion vertical. Select Hyperboloid to simulate reflection on a concave hyperboloid surface.
Vignette	Isolates the shape of a spherical distortion from the rest of the image. If the image has a visibility mask, the areas of the image that fall outside of the distorted area will be transparent. If the image does not have a visibility mask, the areas are filled with the current background color. Use this option when Spherical/Ellipsoid is selected.
No Anti-Alias	Turns off smoothing of edges in the image. Deselect this option for a smoother effect.
Preview	Displays the current effect before you apply the filter.