And FlameWorks 
I for one, need badly a good GI solution and Iām dying to get my hands on VXGI, Iām currently using LPV, which is quite nice but it was a pain to set it up for a full interior scene.
Iām not sure how viable VXGI will be honestly. The Apollo demo only ran at about 30FPS on my 970 so I canāt imagine it running on anything lower without significant improvements.
Hopefully FleX doesnāt have the same issues as VXGI.
It would be nice to have at least as an advanced graphics option for the people that can run itāor in the future where hardware becomes cheaper.
And for people that want to use UE4 to render videos, it would be great since it would be fast and easy.
Optimizations for VXGI are still in the works. However, the question of viability for leading edge tech is always a funny one. If an average VXGI scene ran at 30fps on an older, mid-range card, we would have released it a long time ago. Conversely, why would we keep holding it back at point, even if it can only be applied to optional features for gamers with high-end hardware? Games adopting VXGI year probably wonāt be released for 18 months or longer, and GPUs catch up quickly.
Keep in mind that (true) āGlobal Illuminationā is one of the two Dragons of Computer Graphics (the other is called āRay Tracingā, you can think about it as a big shiny - and evil - final boss of the Computer Graphics ; D).
Next close-to-metal APIs (true multi-threading, hurray!) with modern, and upcoming, GPUs rendering features (āvolume tiled resources/volume sparse texturesā) will probably give Us (developers!) the weapons to defeat the first Dragonā¦ and potentially those weapons could become the start point for approaching the final boss :P)
Hey guys just wanted to add to the chorus of excitement about these releases - really looking forward to all of the coming branches. Thanks for releasing !
Also excited for .
Donāt suppose official GM200 reveal by the end of the month too =p
Thank you so much to nVIDIA for all the GameWorks features being added to UE4. I know SLi is unrelated to GameWorks so, advanced apologies for going off topic but, I think is the best place to ask for a nVIDIA since you are actively discussed . Thus, could you add SLi support to your UE4 repo? It should technically not be feasible since so many relies on inter-frame dependency like Temporal AA, Motion Blur, etc. But, I was hoping you guys can ask how Zombie /Builder Box Games pulled it off in their UE4 game Daylight. Anyhow, a good alternative would be to either allow VR SLi and 3D Vision SLi which, should not have too much compatibility issues or, you could allow the second GPU to only do the GameWorks computation which should, theoretically, be quite asynchronous to the render thread akin to the old days add-in card. Thank you
I asked some of the experts at NV, and although it is certainly possible, there are a few reasons why itās not trivial.
The biggest problem seems to be that any integration we do will be fragile with respect to changes in the UE4 rendering code, which has been changing frequently and significantly over the months. If we take extra time and care with the integration we can minimize the of having the engine code change from underneath the , but a good measure of maintenance will still be required every time Epic pushes a new release. In time the UE4 code base will stabilize and SLI support will become more practical. A second is that running SLI optimally requires a driver profile specific to each game. We could get away with a UE4-specific profile for development purposes, where you would have to rename your executable to match the profile in order to test SLI; or you could use a generic profile by overriding the mechanism using the NVIDIA Control Panel, but your ability to tune the setup will be restricted. Then when you ship the game you would work out a custom profile with NV using your shipping gameās .exe name.
We will look into scheduling the work, but we have quite a backlog of requests right now and I canāt even guess at an ETA.
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Weāre nearing the end of January. Im gettig really excited now!
Cool! Me too. I am confident that we will have the FleX branch up on Github next week. VXGI has a couple of last minute issues, the engineers are working through them; with any luck the end of next week will see VXGI up there too.
Itās like second chrismast!
Second and third Xmas! canāt wait either to give it a try - Thank you very much for bringing to the UE4 community!
**SnowWorks **?
I think it would be great and useful if GameWorks would be expanded to include deformable, interactive snow
- similar to BATMAN ARKHAM ORIGINS:
v=iMbsXfnOpFc
A dream would be similar like LOL ;):
v=9H1gRQ6S7gg
That second video is pretty much just the FleX water solution modified to be thicker, stickier, and āclumpierā :p. I am nearly certain you can create something very similar using FleX. It is a rigid body particle based fluid simulation system, which uses small spheres to calculate volume and then render it as a liquid, I can easily see it being used for snow as well by thickening it:
v=1o0Nuq71gI4
The snow in Arkham Origins is just using a dynamic height map which is far less difficult to achieve, but cannot be used on landscape. In the game it is only rooftops or other small confined areas instead of being used everywhere. is the GDC presentation papers on it if you are interested: ://www.gdcvault/play/1020177/Deformable-Snow-Rendering-in-Batman
@ - Ok, thanks very much for your help! 
No problem!
But wait for to respond to about using FleX for snow, I am almost positive it will work but he can confirm it for us.