Showing image in full screen

UI
1

I want to display a jpg image in my box gui when the screen is in full screen.
The image resolution is 2048X2048. and i have my box width and height as Screen.width and Screen.height respectively, but the image is not visible in the entire box. My monitor Screen resolution is 1280X1024.
I am sending the image file for reference as an attachment.
Plz do help.
Thanks.

192152--6800--$splash_screen_201.jpg
192152--6800--$splash_screen_201.jpg1280×1024 378 KB

2

It would be worth using Debug.Log to actually print the values returned by Screen.width and Screen.height (and also the width and height of the image texture) to check they actually are what you expect.