Heyy i rendered a Wallpaper with a normal Netherportal the inside are endgateways that i placed in with a Shade and after that i textured them to an End portal..
Placed down some lighting in this Picture i used Cyan and Megenta btw this Wallpaper is acutal a shot from my cinematic Intro
Picture is free to use but don't say it's yours (If you can promise this you don't need to credit me )