Acorn Acorn 7

Distortion Effect Filters

Many of the filter definitions below come directly from Apple’s core image filter reference.  

bump distortion linear.acorn  


bump distortion.acorn

Bump Distortion

1__#$!@%!#__bump distortion linear.acorn

Bump Distortion Linear

circle splash.acorn

Circle Splash Distortion

circle wrap.acorn

Circle Wrap Distortion

Bump Distortion: Creates a bump that originates at a specified point in the image. The bump can be concave or convex.

Bump Distortion Linear: Creates a concave or convex distortion that originates from a line in the image.


Circle Splash Distortion: Distorts the pixels starting at the circumference of a circle and emanating outward.

Circle Wrap Distortion:  Wraps an image around a transparent circle. The distortion of the image increases with the distance from the center of the circle.

glass distortion.acorn


1__#$!@%!#__glass distortion1.acorn

Glass Distortion

glass lozenge.acorn

Glass Lozenge

hole distortion.acorn

Hole Distortion

light tunnel.acorn

Light Tunnel Distortion

Glass Distortion: Distorts an image by applying a glass-like texture. The raised portions of the output image are the result of applying a texture map.

Glass Lozenge: Creates a lozenge-shaped lens and distorts the portion of the image over which the lens is placed.

Hole Distortion: Creates a circular area that pushes the image pixels outward, distorting those pixels closest to the circle the most.

Light Tunnel Distortion: Rotates a portion of the input image specified by the center and radius parameters to give a tunneling effect.

pinch distortion.acorn 


pinch distortion1.acorn

Pinch Distortion

torus lens.acorn

Torus Lens Distortion

twirl distortion.acorn

Twirl Distortion


Vortex Distortion

Nine Part Tiled: Distorts an image by tiling based on two input breakpoints.  

Pinch Distortion: Creates a rectangular area that pinches source pixels inward, distorting those pixels closest to the rectangle the most.

Torus Lens Distortion: Creates a torus-shaped lens and distorts the portion of the image over which the lens is placed.

Twirl Distortion: Rotates pixels around a point to give a twirling effect.

Vortex Distortion: Rotates pixels around a point to simulate a vortex. You can specify the center and radius of the effect.

Try playing around with some of the filters and experiment, experiment, experiment.  For more information, check out the Tutorials or send an email to and request a tutorial.

Additional Relevant Documentation  

Filters Basics (video tutorial)

Filters Basics