[ImDatingJava]

I've noticed that, for example, one game will have its model/image files in a format like:

Soldier.mimg

And another will have something like:

SoldierAnim.animimg

But how exactly, per se, do they do this and why? Is a standard image-extension or format bad entirely? I mean even if it's to encrypt/protect the data from being changed, it can still be changed.

And I notice that mainly only do professional video game companies do this, and amateurs/indies may not, unless it's a serious project.

[janikPilot]

Well I know on Linux and Mac, file name extensions aren't required. That's why you can copy files and just name them "something.backup" I believe it's just however they want to name it. I'm not certain how this translates into Windows, but at least that's how it works on UNIX.

[ImDatingJava]

File name extension is one thing, but an actual format that the file is translated in to is what I question.

Many companies both encrypt and change the format of their files and file data.