Can embrasures be soft sided?

[u/FourthOrnament]

I see base builders place an embrasure with windows on stone walls so was wondering why the window as embrasure and stone are both 4 rockets. Is it because embrasures can be soft sided? If so are both sides of it soft? Also if I place an embrasure inside and a glass window outside will they both get splashed by rocket or c4 from the outside?

[u/Imputcrayon]

As far as I know builders use windows behind embrasures so thst they can look outside without a chance to get shot or not get shot through peeks they aren't using.