Fallout 2

[napalm22]

This is how it is in the original game files.

I opened up the game files with the fallout animation tool and pulled up a frame, and it looks like that speckling is part of the original. Attached is a screenshot: https://www.dropbox.com/s/ljy8dfsgl14xk15/ss.png

I'll see if I can an in-game get a screenshot...