Often, after I made a model (doesn't matter if it's a gun, or body part), I really wish I could see how it would look in-game (does it fit the proportions, how would the colors look, etc.), but without actually going in-game. And I mean to be able to see the whole player model (combined body-parts-models) holding a weapon (just like if it was in-game). Got the idea? Can anyone do this? I'm sure the utility'll make most modders' lives a frikin' lot more easier, won' it?
If someone didn' get me, then in simpler words, it's something that will put all the models together on screen for viewing.