Hi! I’d like to get the glass material to look more realistic.
The glass I have is about 48mm thick which is pretty thick.
However, with the glass material set up I have, it creates weird refractions…
Any suggestions? thanks 
Unless you are using raytraced refraction, I would recommend not using refraction at all for windows, especially large ones. Screen space refraction is a bad fit for this type of asset and it will cause far more issues than it is worth.
If you must use it, use a very low IoR as the less refraction there is, the less noticable the artifacts will be.
Generally the only kind of asset that should use realistic IoR values are ones that are small in screen space, like bottles and cups.
