Blur filters

[Bryan Driffill]

When a selection is made and a blur filter is selected on 1.8.6, the blur sees the area outside the blur and incorporates it in the resultant blur.

Using earlier versions I did not experience this. I notice that in this tutorial video from 2017 that they did not have this problem: 

 

[Bryan Driffill]

Outside the blur should read outside the selection: 

When a selection is made and a blur filter is selected on 1.8.6, the blur sees the area outside the blur and incorporates it in the resultant blur.

Using earlier versions I did not experience this. I notice that in this tutorial video from 2017 that they did not have this problem: 

[MEB]

Hi @Bryan Driffill,
Welcome to affinity Forums
As far as i'm aware there wasn't changes here. The current version (1.8.6) works exactly the same way as in previous versions. If you look closely at the video you posted above, you will see the blur also picks the area outside the selection - notice in particular the gap between the arm and the head (near the nose) when he increases the radius of the gaussian blur - the arm's color "contaminates" that gap area which is outside the selection (the whitish sand becomes yellowish). The selection only masks the result of the gaussian blur operation, not the input pixels (this is by design).