I've seen apps like Isolator which allow one to focus or concentrate on the frontmost window by blurring out the others; I'm looking to do the opposite: blur out the main window (or the entire monitor) and be able to easily toggle it on or off.
My goal: using this with digital art software such as Photoshop or Illustrator, to create the "squint" effect one does to get a different perspective on how your artwork is progressing. I'd like to be able to toggle this on so I can work in "squint" mode for a bit, then toggle it off. Would be great to be able to easily set the blur level as well.
Hoping it can be accessed and toggled via Core Image and AppleScript or similar.