The brain is said to be the most complex object in the universe (although we haven't been everywhere in the universe). Nevertheless, the brain is certainly complicated organ. I won't dwell on the number of neurons it has, nor the number of connections each has with its neighbors. (That can be your homework.) For the moment, I just want to use the brain as an(other) analogy.
Previously, we plotted the sliver gallery catalogue on a 2-dimensional plane. Now, imagine it in the shape of a brain. Imagine slivers as neurons. And then, try to imagine what a nerve impulse, a chain of neurons firing, would represent.
Firstly, the process is over in a flash. Let's imagine it takes no time at all, is virtually instantaneous. The electrical impulse might be thought of happening at once, but in sequence.
Might the reality we experience consist of a set of such neuron-slivers? We seem to flit from one to the next (very rapidly) and infer the passage of time from that. The slivers would need to be 'permissible' i.e. neighbors in the sense that they follow the physical rules of the universe.
Extend the analogy: from gallery to brain to tree. As a nerve impulse travels the gallery, selecting from a range of permissible extant slivers, it is not, in fact, bringing into existence the future, but bringing into focus, or choosing, one of a multiplicity of all possible futures. There is a branching out from every instant.
The trunk forms branches, sub-branches, twigs, and leaves. Reality radiates from every sliver. At most, one path can lead to it, but many do follow.