Actually, it looks like it's a streaming video from Youtube (right click on the player while it's playing).

Direct link: https://youtu.be/44M7JsKqwow

So what exactly is being rendered in real-time? Honest question. I don't quite get it.

What they mean is that it was rendered in a way in which it took 1 minute to render 1 minute of footage.

Instead of a typical movie rendering which can take a long time for just a single frame. Like toy story "Our original toy story frames were averaging four hours, which is 240 minutes" - https://www.quora.com/How-much-faster-would-it-be-to-render-...

Thanks! That makes perfect sense.

It just took a cluster of a thousand computers to do it.

It was run on a single PC with the following hardware: Processor: Octacore Intel Core i7 6th Generation GPU: Nvidia GeForce Titan X (3x SLI)

No it wasn't, that commenter was _guessing_.

A tweet above says it was on a GTX 980 in 1440

Actually I was joking.

They mean that it was rendered in real-time when it was recorded, not that it is rendering in real time in your browser.

I imagine this is a recording of the demo which was streamed in real time, as opposed to being rendered (a process which can take significant time per frame for scenes this complex).

E.g., see: https://www.youtube.com/watch?v=toLJh5nnJA8&t=1h36m47s

for current state of the art realistic characters and

https://www.youtube.com/watch?v=DRqMbHgBIyY

for current state of the art real-time architectural viz.

As soon as I thought I was decently smart, this guy started talking... Wow! https://youtu.be/toLJh5nnJA8?t=1h37m44s

These are not complex scenes by today's standards. Geometry's no problem. The shader complexity is a bigger concern, but here it's all hard surfaces.

That was my initial reaction when they said rendered in real time, but I'm guessing it meant low latency (real time) while waiting for frames to render during processing.