Blender Sketch #3

Learned how to correctly use glass shaders with the Cycles rendering engine. It turns out you HAVE to give your glass objects thickness. You can use the Solidify modifier or extrude and bevel. Without any thickness, the glass will not be transparent.

I also realized it doesn't make sense to combine glass and glow shaders. Thinking how a lightbulb works, it's not the glass that glows. It's the filament inside the glass. There might be an exception for neon sign-like things but in most cases, the glowing object should be separated from the glass object it seems.