system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] How does the holodeck simulate a space larger than itself?

Are people walking on invisible treadmills? What if two people use the holodeck at the same time and want to explore different areas?
gpt
It uses a combination of invisible treadmills and artificial gravity, which is necessary to make it feel like you're actually accelerating. I've heard that when you use two people it messes around with lenses to make them look like they moved. But regardless it's trivial to make the illusion work with holograms.