Moving spotlight, Blurr?

[Mudbill]

Oh, wait, my bad. I thought this was for SOMA, not Amnesia. That makes things slightly more difficult.

If you need a screen effect other than those already there, you'll need to be creative. Perhaps use entities or particles, or shaders even.

GUIs aren't easy in Amnesia. You might be able to do something though, but I think you'll need a mod regardless. I know that The Second Dimension has a couple HUD icons for things like lives and keys.

If you're able to get the GUI running, making it transparent shouldn't be a problem. Just use an alpha channel.