You mean fluid dynamics? That is very difficult to simulate realistically. This is actually an entire area of study in computational science and engineering.
But I suppose there could be some basic fluid animations for liquids, gas and so on that is somehow affected by a simple model of particle or body collision. This would be cool. And considering what we saw in that one video *ahem* I would say CDPR are on their way to some impressive weather effects. How reactive these are to *our* actions, remains to be seen. But if you don't see what you're expecting, do not be disappointed. It takes an entire group of scientists and hundreds to thousands of hours of intensive computation to simulate a couple of minutes of real world physics of water or smoke
But I suppose there could be some basic fluid animations for liquids, gas and so on that is somehow affected by a simple model of particle or body collision. This would be cool. And considering what we saw in that one video *ahem* I would say CDPR are on their way to some impressive weather effects. How reactive these are to *our* actions, remains to be seen. But if you don't see what you're expecting, do not be disappointed. It takes an entire group of scientists and hundreds to thousands of hours of intensive computation to simulate a couple of minutes of real world physics of water or smoke
Real-time fluid dynamics has come along recently, though I don't know how ready it is for AAA game application, and we end up making do with particle engines. If you can limit the number of particles, you can get some of what you want. But it doesn't look like real smoke or fog or rain or snow or water; you need better fluid dynamics for that.
Here's a long and detailed series of papers on the computing required; the first part and links to the rest are at http://software.intel.com/en-us/articles/fluid-simulation-for-video-games-part-1
And here's an example of what nVidia's currently demonstrating for incompressible fluids in PhysX: http://www.joystiq.com/2013/04/24/these-physx-fluid-simulations-are-making-us-thirsty/
The paper behind the nVidia demonstration: http://mmacklin.com/pbf_sig_preprint.pdf They were using CUDA with a GTX 680 as their engine.
Here's a long and detailed series of papers on the computing required; the first part and links to the rest are at http://software.intel.com/en-us/articles/fluid-simulation-for-video-games-part-1
And here's an example of what nVidia's currently demonstrating for incompressible fluids in PhysX: http://www.joystiq.com/2013/04/24/these-physx-fluid-simulations-are-making-us-thirsty/
The paper behind the nVidia demonstration: http://mmacklin.com/pbf_sig_preprint.pdf They were using CUDA with a GTX 680 as their engine.
Guys interestingly enough the PC version of Call of Duty: Ghosts will be using Nvidia's PhysX and APEX physics engine in the PC version of Call of Duty: Ghosts the smoke actually moves around the players body or even the NPC's body when you go through it fog, mist, and smoke is not a 2D sprite anymore it is a 3D rendered thing in real time and dynamic now.
http://www.geforce.com/whats-new/articles/gamescom-2013-call-of-duty-ghosts-to-be-enhanced-with-nvidia-txaa-and-nvidia
Activision and Infinity Ward said that even more graphical effects and physics will be added to the PC version of Call of Duty: Ghosts in patches after it is released in November.
So I have a feeling CD Projekt RED will do the same thing to the PC version of The Witcher 3: Wild Hunt.
Heck we may even see blood, fluids, liquids, and water done in 3D and rendered in real time all dynamically like in the PC version of Borderlands 2 blood and the fluids in the outhouses is all in 3D and dynamically rendered and interacts with the environment.
http://www.geforce.com/whats-new/articles/gamescom-2013-call-of-duty-ghosts-to-be-enhanced-with-nvidia-txaa-and-nvidia
Activision and Infinity Ward said that even more graphical effects and physics will be added to the PC version of Call of Duty: Ghosts in patches after it is released in November.
So I have a feeling CD Projekt RED will do the same thing to the PC version of The Witcher 3: Wild Hunt.
Heck we may even see blood, fluids, liquids, and water done in 3D and rendered in real time all dynamically like in the PC version of Borderlands 2 blood and the fluids in the outhouses is all in 3D and dynamically rendered and interacts with the environment.