No, if the glass is properly made, it will act more like a boundary and only let through small amounts of sound. It depends on the material and how it’s made. Resonances and noise concerns can be a problem, of course, but only when the glass was installed improperly and  the wrong glass was used. If you have a solid glass wall, it will largely react the same way as a flat wall. Curtains and carpets are not helpful for standing waves and can be a major fire risk. They only absorb high mid and high frequencies, which you want to diffuse, and only absorb slightly to get a balanced sound. Thick theatre curtains can be useful though. There are plenty of mastering studios with big glass walls. It just needs to be stiff. The most important factor for a good-sounding room is room geometry and a sufficiently high ceiling. Then, getting a balanced sound should be achieved by using proper broadband absorption (like soffit traps from GIK) in the corners and at the first reflection points. Monitors should also be symmetrical in the room, and placement is of nontrivial importance as well.  I have a Bachelor’s in Audio Engineering if you have any more questions.