I'm making a 2d game for android where I want to make the background blur when a popup opens.
I have tried so many techniques.
Making two camera. Blurred main camera and changing culling mask of secondary camera to the popup layer.
Using grabpass shader in a material and adding it to the background of popup.
Capturing screenshot, blurring the texture and adding it to background of popup as sprite.
Everything doing exact what I want to do. But either they are eating FPS or taking a huge time at first time.
So is there any way or workaround which will not slow it down or lag?