How do I make certain GUI textures be in front of other GUI textures?

Questions & Answers
1

I have a health bar system and i need the health to be above the bar that it is in so that it appears as if the bar is slowly draining but for some reason it is behind I don't get this?

How do I make the health take preference over the bar in the GUI?

2

You can use the z position to set the rendering depth. The lower it is, the more in front it should be

3

If your GUI textures are drawn from different components, you can also set GUI.depth in the various OnGUI() methods ... to make Component1 draw over top of Component2:

Component1:

void OnGUI()
{
    GUI.depth = 1;
    ...
}

Component2:

void OnGUI()
{
    GUI.depth = 2;
    ...
}