In the new updated Steam Library; I am able to add a 'Non-Steam Game', set a custom icon to it and set 'Custom Artwork' for it.
When I set a custom icon; I use
'.ico' files and that works fine.
When I set 'Custom Artwork'; I use
300px by 450px (Portrait) and that works fine in the normal library.
But when I go to Steam Big Picture; I see only generic steam landscape cover images or the games' original icon. (Not the custom
'.ico' I set.)
How can I set custom landscape cover images in Steam Big Picture for my 'Non-Steam Games'?
Also I've found this site: Steam Banners
...and was wondering how to set the banner image after selecting a game in my library.