You can choose the art style & visuals of whatever universe you're in on the fly. This doesn't functionally change anything, and you're the only one who notices, but sometimes the universe badly needs a redesign.
You can mix and match styles and even set conditions, like if, for example, you wanted everything in the Wormverse to look as gloomy as normal, but in-costume capes looked like four-color comic heroes. That said, this isn't a Thinker power, and you can't use it to "cheat." For example, you can't pull the old video game trick of having plot-important items that look significantly more detailed than regular ones.