Hi…
are GUITextures wasting resources while they are on the screen but with alpha 0% ?
The overhead will be the same as when the texture is visible. It’s not a good idea to have a GUITexture hanging around all through the game but usually invisible due to its transparency. However, it isn’t a problem to keep it around just before or after it has been faded in or out. You can set the GUITexture’s renderer.enabled property to false to turn off rendering if you want to keep it in the scene but usually hidden. There is no rendering overhead if you do this.