I'm not sure what it is, but every time I see simulated snow there's just something wrong about it. My brain just instinctively tells me "that's not snow" and s

I'm not sure what it is, but every time I see simulated snow there's just something wrong about it. My brain just instinctively tells me "that's not snow" and suggests sand or something else. There's a definite uncanny valley effect for snow