Well, it sort of is the goal..

So, now I'm trying to select a parent object by assigning the variable in the inspector.

var BodyVisual:Component[];

And then, this is how the code is:

BodyVisual=gameObject.GetComponentsInChildren(Renderer);

for(var joint:Renderer in BodyVisual){

joint.active = false ;

}

For some reason, this makes everything in my object with the script inactive. I want to select an object as a parent.. What should I do?

Ps: sorry, I don't know how to put the "code" format in when I'm commenting.

Also, this has nothing to do with joints of course..

Ok.. so, you're wanting to disable the renderer "ONLY in the object this script is attached to" and NOT in the children?? Or what? I'm confused now. You wanted hingejoints, and are accessing children, but you really want a renderer and the parent?

In this line: var BodyVisual:Component[];

I want to select just the car body mesh (which has many roots) with the inspector and hide the car body mesh. If I disable everything inside the car that the script is attached to, then you are disabling some imortant things besides along with the car body, wich is not what I want. I hope that make more sense..

Why do you have them all stacked crazy like that? Is there a method in the madness? ... If not, you could make all those things "children" of Body_Visual, and hit'em all at once. I don't know how to go through 500 generations of objects in one shot, and don't feel like figuring it out at the moment either lol

To get them in one shot ^{After making them children, not great^infinityGrandChildren objects} , you could simply do this ->

    var bodyVisual : Transform ; //drag it on here
              
     //then do whatever you're doing to call the renderer-disable stuff and
     for(var child : Transform in bodyVisual){
        child.renderer.enabled = false ; //disable children renderers
     }
     bodyVisual.renderer.enabled = false ; //disable bodyVisual renderer

and be done with it.

EDIT :