The scenes filmed in them are typically so utterly flawless that they come off as just another scene. They blend in. There's nothing visually interesting to look at. When something is created, it just appears. No projections or lasers or machinery of any kind. There's never any minor glitches to make me feel like I'm watching an amazing technology as opposed to actors just doing another scene. They had the right idea when Data threw the rock to show it's not unlimited. It informed the audience that the scene was more than just actors in a forest. Visual hints like that should've been used every time they were in one.