Anyway, I'm wondering if it's possible to use a Plane as an infinite scrolling background...
I can live with it, just wondering if there's a way to flip the plane as RotateEntity plane,0,0,180 just makes it vanish
Sorry for the confusion, RotateEntity plane,0,0,180 is what you would use to flip the plane for use as a sky (as Strider Centaur asked). You also have to position the plane higher on the y axis... PositionEntity plane,0,40,0 once this is done you will have a visible plane above you.
If you want to use it as a scrolling background try this:
RotateEntity plane,-90,0,0 ; <-- this flips the plane 90 degrees to the ground
PositionEntity plane,0,0,10 ; <-- this moves the plane away from the camera
What you now should have is the plane in background and a small gap between the plane and the camera.
If you don't see the plane, it's inverted and needs to be rotated by another 180 degrees, that's why I've used -90 (90 would be inverted).
BTW, IPete2 was having a little joke... "Smiling like a Cheshire cat" it's an old saying ;)