Question [URP] How to do a Glass with distortion + "decals" on it?

Hi, I have this shader that produce a distortion effect with things that are behind the object.


Here is the result:
But also I want to add this texture as "decals".

The idea is to create a glass that distort the things behind it and also have some "decals" on the glass. The decals should not be distorted.

Any idea on how to achieve this?
I attach the shader.

 

Adding a Lerp node with the Scene Color as A, Texture RGB as B and the Texture alpha channel as T does the trick

 

Thanks you very much! It works.
Just one thing, do you know how to render other transparents object behind this? All objects with opaque materials render fine, but transparent don't appear.

Thanks again.

 

Finally got it working using this custom Render Feature:
Unity URP custom grab pass (github.com)