I noticed when using the observation glass that you cannot see hard light bridges through it. Is there any way to change that behavior?

You mean like this?
http://limited-development.net/images/light-bridge.jpg

not quite - i mean the actual observation glass used for the little observation windows throughout the game. It's an actual model you can filter for with the keyword "observation". I may end up using the frosted glass in the image you provided if I can't get a good alternative.

I use a prop of the window frame and then use a brush for the glass, I'm not sure if hard light bridges are viewable from it though.