The phrase "a completely different scene" is correct and usable in written English.
It can be used to describe a situation or environment that is entirely unlike another, often in a contrasting context.
Example: "After the storm passed, the once bustling beach was now a completely different scene, with debris scattered everywhere."
Alternatives: "a totally distinct scenario" or "an entirely new setting".
Flash forward less than a decade, and it's a completely different scene.
At the end of last year, said Rick Ruiz, the school's principal, it would have been a completely different scene.
Now he runs the Carroll Villa and its attendant restaurant, the Mad Batter, and wintertime in Cape May is a completely different scene.
[In] the post war boom, girls and guys,it was a much more open scene, and you know free love, and the pill had just come in, so it was a completely different scene.
"It used to be a completely different scene, with a child's father walking in reluctantly to tell us, 'He's fine; this concussion stuff is nonsense,' " said Dr. William Meehan, a clinic co-founder.
Rhiannon was able to become successful gigging on the Top 40 and mainstream EDM club circuits, but that's a completely different scene than she originally was trying to make it in when she first started playing out.
Except, later in the episode, it was revealed that the shouting and the falling happened in two completely different scenes, and there wasn't even a nuclear explosion noise when she fell over anyway.
To provide insight on how a photographer might think through their captures of canopied trees, I'm sharing three completely different scenes and what went through my mind as I photographed each one.
Lithgow called Rita's death a "fantastic choice", which he said shed a completely different light on the final scene between Dexter and Arthur, which appears to be somewhat sympathetic before the audience learned what Arthur had done.
I wanted the animation to have a completely different look for the prison scenes.
