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human
[Marvel] Do reality warpers (Wanda, Mad Jim Jaspers, Franklin Richards, Reality Stone) only create an illusion of reality or do they actually change reality?

I am assuming there is a difference between them according to their power level, but this question stems from Thanos using the reality stone to “mask” his destruction in the collectors hideout. 

While the stone was being used, the room was as if nothing had happened, but then it “switched back” to the “real reality”. In this case, reality manipulation is really just a really good illusion. If the reality stone manipulates reality itself, couldn’t he manifest a reality where his opponents don’t exist? 

We move to Wanda, who creates the hex where her constructs are so powerful they can fight with “real” beings like the Vision fight. But as explained, its also all an illusion, or a spell. 

Now if we move to Mad Jim Jaspers, or Franklin Richards, they manipulate reality on an cosmic level. Is what they do really binding? Meaning couldn’t they just wish for example Thanos to not exist and he just doesn’t exist anymore. Or is it all an illusion while they maintain control? If they alter reality, can they reverse death?
gpt
They actually change reality.

The reality stone by itself *does* alter reality, it just doesn't alter reality *permanently.* Thanos could manifest a reality where his opponents don't exist- and he does, he effectively makes Drax and Mantis disappear- it's just that when he stops concentrating it snaps back. Wanda, meanwhile, is actually altering reality with the Hex- the fact this isn't just an illusion but an actual changing of reality is a major plot point.

The more powerful reality warpers can and do change reality, including reversing death and erasing thanos.

Basically, yes, there is a difference between an illusion and a reality warp, even a temporary or localised one.