there are two types of walls in my office:
1) glass-wall (translucent)
2) white wall (opaque)
for an alpha channel, i found an image that gave me an idea

-from Pamphlet Architecture
on the right, i found the pattern with ovals and curves quite interesting and decided to use it for my alpha channel.

this is the pattern that i made using photoshop
i gave some of my glass-walls textures




