White overlay/fade artifacts on dark images

[brokosz]

When blurring a predominantly dark or black image, the right side of the image has a pronounced white faded edge. Not sure if there's some way to render this off image or change the color of the transformation.

[sindresorhus]

Could you share an example?

[brokosz]

Sure - source image, minimum blur, and maximum blur:

[sindresorhus]

I looked into this today. This is caused by rounding error somewhere in Apple's blurring code which causes a 1px gap on the right side, which when blurred, becomes much larger. I unfortunately did not yet manage to find a solution to this.

However, there's an easy workaround. Just slightly crop the height of your source image before opening it in Blear and you won't see the issue.