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I'm trying to make an effect using the Blender Compositor, but I didn't know how to do it, and please I want the solution using the compositor not by adding more objects (Lens).

Here is a picture to explain what I want to do : enter image description here

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Here is an alternative that allows you more flexibility. You can use different textures for different effects. In this example I have only used the X axis for side to side distortion but you could just as easily make a spherical shape with the Y axis as well.

Distortion via texture

I have also shown with the Curves how to edit the amount of distortion.

The color ramp (which is inactive here) is another way to adjust the distortion effect.

And here is the blend file

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  • $\begingroup$ Could you send me the blend file please :) :) $\endgroup$ – Khalil Bz May 31 '17 at 0:40
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Final result:

Final

Composition nodes:

nodes

Overview:

I don't know your scene setup but mine is just plane with procedural stripes.

After render you just need to connect couple of sets - Lens Distortion + Scale nodes and adjust values as you like. X value will stretch pattern, Y is for straightening up after Lens Distortion.

Blend file:

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  • 1
    $\begingroup$ You are a wonder and it is just what I need for Funky Pattern scrapbook. Thank you very much. $\endgroup$ – Rita Geraghty stands by Monica Jun 3 '19 at 14:35

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