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Ho to blur the image, with as much less effort as possible, so the blur wraps around the edges

I want to blur HDRI maps

  • Do you want to get a dark halo effect as on HDRI images? – slawek Apr 16 '14 at 22:59
  • Do you have any examples you can show us of what you are trying to achieve? – Yisela Apr 16 '14 at 23:05
  • The effect you are looking for might be called "vignette". Search for that and see if it helps. If not, show us some screenshots of what you want to achieve. – benteh Apr 17 '14 at 0:11
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    I think this is about a blurring operation, when applied to pixels on e.g. the left-hand edge of the canvas, having an effect on the pixels on the right hand edge of the canvas. HDRI maps would normally be wrapped into a sphere or hemisphere, so this might be required to prevent causing a visible 'seam'. – e100 Apr 17 '14 at 16:32
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  1. Duplicate your original image into a new layer.
  2. Add guides to edges of original image.
  3. Enlarge your canvas by 200%.
  4. Duplicate the image to all eight neighboring sides to make seamless tiling.
  5. Apply blur of choice.
  6. Crop your canvas down to original size.
  7. You now have wrapping blur with no hard edges!

Seamless blur

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