The glass material has some mild but annoying bugs flaws. One of which being that chat bubbles cannot appear behind a transparent glass materials. It also hides Surface GUIs, other transparent glasses and Surface Text. The bug is an engine bug and is the same on all games. It happens all the time and I couldn’t find a way to fix it. Hope for the glass material to be fixed in the future.
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The chat bug:
Other users chat bubbles will be unable to appear if you move your camera so they appear behind a glass. -
The GUI and Surface Text bug:
Similar to the chat bug, if you move your camera where one of which are behind the glass, they won’t be able to appear. -
Other glasses bug:
It can also be used for pretty neat X-Ray effects but if the glass behind the other transparent glass has a transparency value, it will appear invisible.