I hope to use Nvidia integration.
however, if Nvidia Flex and VXGI do not support AMD cards, I can’t use this.
Please let me any information about it 
Hiho ^^
Normaly ATI-Cards can run Nvidia Physiks. Its call Nvidia-Physiks cause its from Nvidia … and dont mean that you need a Card from Nvidia., There are only a few specials wich will need an Nvidia-card (mostly features in Games).
Nvidia Physik is the fastest Engine out there but some options need a 1080 … like the Fallout 4 Godray Patch.
VXGI is nice but, i think, not realy needed.
FLEX is joust super duper awsome and easy to use.
PS: If you going deeper into the "all the ■■■■ for developing, … " Intel and Nvidia is the way to go ^^
Have a nice Day 8)
At least VXGI works on AMD. It’s just faster when paired with hardware optimizations that nvidia has made for voxelisation step.