If so, do you believe we're in a Turing machine of some sort? Are you a finitist?
If you are not a materialist, what metaphysical thing do you believe in? A Being Creator? Spirits? Do you believe in ghosts and fairies?
1. They don't know about anything outside of their VR world. They could have made up fairy tales or religions about what could have possibly created their world. They would be completely unaware about our existence. This could be our case - we ourselves don't know if we're living in a simulation.
2. They have been able to infer enough from the peculiarities of their reality to suspect they are living in a simulation, and that there are beings which have created the simulation.
3. They know they live in a simulated world, built by us. We made contact with them and told them all about our world and how we made their world.
You can argue that, in the first scenario, something that "does not exist" is not "material" or "natural". But this would be strictly their ignorance or misconceptions. It does not change the reality that both we, and them, are material beings. In fact, if you insist on this argument, you might already be assuming that our world is not entirely material, because it would follow that our subjective opinions define reality.
Scenarios 2 and 3 clearly allow the possibility of them perceiving us as equally material beings.
This was Spinoza's position on creation.
If the universe was created by a lone demiurge, then creator and the created would both be material.
The only spirit I believe in is Dom P.
If you start from a materialist position (including from the modern scientific position), then you are inevitably faced with some kind of reductionism. If all that exists is matter and the laws of physics, then all you can be is matter that obeys the laws of physics - nothing more. You're just a collection of atoms that obey the laws of atomic physics, assembled into molecules that obey the laws of biochemistry, assembled into neurons that obey the laws of neurology.
There is no room for choice or free will in that view. But equally, there is no room for love. (Especially love in the highest sense, of choosing to do what's best for the other, because you can't choose anything. But even in the sense of attraction, that's just neurons and biochemicals doing their thing.) There is no room for beauty as a real thing - it's just what hits our neurons a particular way. There is no room for truth as truth. (There are things that we find convincing, in our hardware that evolved to get a good enough answer fast enough, rather than to find actual truth or to do pure logic correctly.)
There is not even room for personality. All you can be is the impersonal plus complexity - that's all "personality" can be. There is nothing more for "personality" to be but the artifact of complexity.
But that doesn't match our experience. We all experience love, even though the logic of our position says that love doesn't exist. We all make choices, even though logic says we don't actually choose. We all experience beauty and we all long for truth. And we all long for personal contact - to touch each other as persons, not just as complicated machines. We can try to live within the logic of the materialist position, but it doesn't actually fit who we are as human beings.
It's kind of like when you put a t-shirt on backwards. It covers all the places that need to be covered, but it doesn't fit right. And no matter how much you try to wiggle it around and adjust it, it just doesn't fit.
I suggest that the materialist position doesn't fit who we are as human beings, and that the lack of fit is telling us something. Either we are the products of random chance, thrown up in and by an impersonal universe, with aspirations of personality that can never be fulfilled, or we are not actually what our philosophy says we are. And I think it's the latter.
So I invite you to consider the alternative to the materialist position. If the beginning of it all was someone, rather than something impersonal, then it is possible that we could be truly personal, rather than just the impersonal plus complexity. Then we also could be able to make real choices, and to really love, and to know real truth and beauty. We could be what humans have always thought we were. But you can never have that as long as you hold to the purely materialist view.
For this to work, it really had to begin with someone. It can't be like some polytheistic creation myths, where something impersonal gave origin to the first gods, because then by the same logic the first gods can't really be personal. Their personality can only be an artifact. So you really are pushed to someone who was there before the physical universe.
For a much longer and better treatment of this, see the first chapter of He Is There And He Is Not Silent, by Francis Schaeffer.
Also you can have all those qualities such as love in a materialist view as emergent properties.
And who says we have free will? Or at at least will that is decoupled somehow from the matter that we are made of.
But that doesn't match our experience
Which to me is just a part of inner workings. Confusion, delusion, perception shifts, all looped back to ourselves. Brain does many hard jobs to produce what we call subjective reality. You don’t even need love (not sure which role it ought to play here) to see that it’s all an inner mirage.