system
Given the following post, respond as if you're commenting on Reddit:
human
[The Matrix] When Morpheus and Neo were in the white room, what was the floor made of?

This always bothered me in all sci-fi/fantasy media. When a person is in a default, undeveloped room in a simulation, it's usually a white oblivion. Why isn't there ever any interest in touching the floor to see what it feels like? The same goes for the Animus in Assassin's Creed: what is the floor made of?

Basically, the floor needs to be there for people stand on. But what is the default material in simulations when no material is specified?
gpt
Do you know how in video games there are Invisible Walls, barriers that just stop you from wandering away from the map because anything past the play area because it's just plain unfinished? There'should nothing to tell you it'seems there?

The floor of the white room is similar, something that is programmed with basic collision detection designed to prevent the player character, or in this case Neo and Morpheus, from simply falling through the floor. It basically *is* a floor, just one that doesn't have graphical textures to convey that something is there.

And that's the point. It's basically Morpheus trying to show Neo how much of the world he knew was merely a simulation and wasn't reality.

So, to answer your question in the simplest manner possible, whatever the default setting for 'floor' is, so more than likely it'seems just a flat surface.