1. Open your file.
Start by opening a image of your choice, here we chose a of a pair of sunflowers.
2. Blur the image.
From filter menu select blur then radial blur.
Change the blur method to zoom and adjust settings as shown.
4. Remote the effect.
We want to remove the effect of radial blur from the sunflower and let it be there for the rest of the image. Select history brush tool (Y).
Erase the effect over the flower.
Using history brush we have remove the effect on flower keeping radial blur on rest of the image intact.
5. Done!
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