[nimbleal]

Sceptical (I’m English).

And, I realise. I first learned Houdini c. 2004 so I’m aware of the technology.

Your YouTube link is a perfect example. It looks good but certainly doesn’t pass the bar for mistake-it-for-the-real-thing realism.

[CyberDildonics]

It's easy to say when it's a full resolution demo on a black background and you know it's fake, but sprinkled into a live action shot and I don't think people notice. This is already something that is being done all the time.

Also houdini in 2004 didn't have anything like the fluid simulations it has now.