How to edit a glass shader to make it look like bumpy frosted glass

Question

I was wondering if any of you had any ideas on how I might setup a shader to look something like this (in Cycles):

It's a little bit frosted, but the main thing that I'm trying to acheive is the "bumpy" appearence. Thanks!

Answer 1

You can also use a bump node, which offers more control and tends to have fewer artifacts than the displacement output (see What is the difference between the displace socket and a bump map?):

_{The fake glass node group lets light pass through the glass more easily, see this answer.}

Answer 2

Just set up the nodes as pictured below.

Add a Noise Texture node (Shift+A-->Texture-->Noise Texture) and play with its settings. Connect it to the Displacement socket of the Material Output node. Place a Math Node (Shift+A-->Converter-->Math) between them and set its type to Multiply to control the amount of the bumpiness.

You may also increase the Roughness value of the Glass Node. I think you may not need to add a bumpiness then. Of course you can try to increase the Roughness value and add the bumpiness at the same time.