As you can see, regardless of what material the object uses, it is expressed in various green colors according to certain conditions.
What I want is how to distinguish by object.
If only character could be painted green in Viewport, and if the widget could recognize it, dynamic images like cartoons wouldn’t cover the character.
It’s like a large letter passing behind a character, or an exploding smoke motion graphic appears behind the character.
If by reversible you mean if you can turn it on and off, Yes you should be able to do that by enabling/disabling the post process volume that’s using the post process material.