Hmm… The latter two issues don’t seem likely in this case: I’m writing two other files to the same location directly before the attempted texture-save; they’re text-files, not images, but it still seems to indicate that the directory is present and that I have permission to write there. (The directory in question is in a relevant user-data directory–“C:\Users<user-name>\AppData\Local<game-name>\Saves”, to be specific–I believe.)
So, does an image produced by “DisplayRegion.getScreenshot()” usually have a RAM-image?