NVIDIA GameWorks Integration

[anonymous_user_6fb9478c]

Added Flex into my 4.19.2 GameWorks merge : https://github//UnrealEngi…4.19-GameWorks

Merged repo now contains all the latest changes from NvPhysx for all techs I’ve included on the merge, so there’s Blast 1.1.3, Flex 1.2, Flow 1.0.1, HairWorks 1.4, HBAO+ 4.0, TXAA 3, Volumetric Lighting (1.0?) and VXGI 2.0.1

It took me a while to get Flex to work on packaged builds due to IWYU issues but I did get it running eventually. Fixes of course included on the merge. I’d really hope Nvidia would do non-unity builds for all these branches (at least once now that UE4’s headers have changed a lot since the initial integrations) as it would get rid of these ghostly failures that only happen on some build settings.

Thanks @ so much! Good news for me! Love you so much!