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You guys experiencing this as well ?

I fill a selection with white, open the Gaussian Blur, play around with the values and everything looks fine but after i hit OK, the blur looks weird and has some kind of halo....

[attachment=1691]

I see it, but I think it is an optical illusion. If it where real, there would be a threshold value that would create a white circle with a white ring.

Edit: extreme values of the threshold (on both sides) show that the filters is not  strictly isotropic.

(05-06-2018, 04:28 PM)Ofnuts Wrote: [ -> ]the filters is not strictly isotropic.

what does that mean ?

Isotropic: identical in all directions. The blurred circle should remain a circle. In practice for the extreme values, it looks like a rounded diamond, so the diagonals are not strictly like the verticals/horizontals.