How to do blur with UGUI?

I create a camera and put optimised blur on the it but nothing is blur?

What am I still missing? Thanks!

 

Nothing blurs or just the UI does not blur?
Do you have Unity pro? Image effects wont work without it.
What type of UI is it, overlay, camera or world?

 

Like the example below. When a popup appear, the back all the back image become blur

 

Do you have Unity Pro or Free?

 

The blur post process only works with unity pro since free lacks the render to texture feature needed for such a effect.

If you got free and want a similar effect I would make a new ui image the size of the while screen and put that behind the menu. Then give it a black texture and like 50% Alpha. This way you can darken the game that is behind the menu since you can't blur it.

 

Thanks for the answer! i solved it by changing the render mode on the canvas to screen space - camera

 

I was interested in implementing this as well with a clear UI in the foreground and a blurred UI in the background. How would we actually implement this with uGUI?