[sdwr]

The idea is that the universe "cheats" by replacing a computationally expensive process (a tree falling, breaking into pieces, being eaten by insects, moss growing) with a series of cheaper, "good-enough" replacements, based on the level of scrutiny.

Not existing is the cheapest.

Then, broad strokes, location and orientation

Then pieces, level of decay

etc,

and moving between the layers is you spending your attention budget to force the universe to do more work.

[polishdude20]

At that point, the least amount of work would be to flip the various chemical and neural vitamin my brain to make me think there is a tree there.