Hi. First i need to say that the application it's getting pretty cool, but i also report too that the linux version doesn't show the pixelated option checkbox.
Hey, i've just downloaded the AppImage, and it shows the Pixelated checkbox in the View dock. May you try again and tell me please?
Notice that the effect is not for pixelating the image, it just shows the image with its pixels, and pixelates the light.. it otherwise shows the light blured.