I am playing the game NiBiRu: Age of Secrets and have noticed that numerous 2.25MB files have been building up in the game directory with filenames of the form
grab####.BMP. The files have a bitmap signature in the header, but the rest of the file is just nulls and so are not proper bitmap files and cannot be opened or viewed. Each one is exactly 2,359,350 bytes which is 54 bytes more (for the header header) than what is required for a 24-bit 1024*768 bitmap.
There are already nearly 1GB of files piled up and I still have a way to go in the game.
They seem to be created at irregular intervals, sometimes 20+ in one minute, occasionally only a few per minute, and then sometimes a few minutes without any. It is almost certainly related to input, so I figured the problem is that some other program/hotkey is inadvertently triggering the game's screenshot key. Unfortunately, I checked the (limited) documentation and online and could find nothing about a key to take screenshots.
Does anyone know if there is a screenshot key and/or how to stop it?