How can I prevent my GUI background texture from getting pixelated or stretched?

Hello,

I have a high res image that I would like to use for my background of my GUI menu (1600 x 1200), but I cant seem to get it right. Its either stretched or pixilated.

I'm currently using this to display my image:

GUI.DrawTexture(Rect(0, 0, Screen.width, Screen.height), 
                MenuBackground, ScaleMode.StretchToFill, 
                true, 10.0f);

I have also made the image true colour and given it a size of 4096.

With that current code - it looks pixilated. (I would like to keeps its ratio too)

Please help ... Thanks, Ollie

make an empty GUITexture Object and drag your texture onto it

edit: you don't need to script it if you use a GUITexture gameobject, but if you don't, use ScaleAndrop instead of StretchToFill