Blurry transparent object

Hello! I’m trying to make an effect where one layer is a mask that makes everything that’s behind it blurry, as if it’s a frosted window or murky solid. Right now I’m using the shape as a mask for a gaussian blur effect that’s applied to the final composition just before render, but my scene is quite complicated, and I’ve had to use a bunch of nodes and keyframes to turn the effect on and off, and adjust the mask so the shape causing the blur can move behind and in front of different objects.

Is there a way to make a blur that applies to everything behind a given layer, like a window, rather than having to attach the blur to the composited layers at the end?

Thanks for any help

Hey waterwheels

You could try using the focus effect. If your elements are positionned in Z depth, the blur will act as a focus point inside of your scene. You can find out more about it here:

Hope this helps! Let us know how it goes. :slight_smile:

The focus effect does not do what I’m trying to do. I want to have a translucent object that shows the background through it, but everything you see through it is blurry, like if you looked through murky jelly or a frosted window.

I would do it either by:

pipping the backgrounds and anything else into the blur setup of the glass once animation is finished.


render out the background/characters, render out the front glass piece, then put it into after effects and apply the blur to the bg stage under where the glass is.