I'm looking for a way to Blur my background behind a GUI window in Unity. Think Windows 7 GUI. When a window pops up you can still see what is behind that window but it is blurred. Is this possible? If so how would one go about producing this effect?
Steps I took to make this happen. The great part is that it doesn’t render anything extra, rather it applies the effect to whatever is being rendered behind it. (Excluding GUI components.)
Made a new camera, depth only, culling mask as nothing.
Added blur effect to the new camera
Positioned the new blur overlay via viewport rect
Here’s a quick example I made by putting the camera in that area, and putting a translucent black overlay via the GUI.