NVIDIA GameWorks Integration

[anonymous_user_7c71c8ec]

@;536731

did we just skipped 4.11?

Yes. I didn’t have time to finish the 4.11 port because of other work related to VRWorks 2.0 which we just released, and then 4.12 became available.

@;536825

Hi ,
I have to say thank you and VXGI on UE 4.12 is great news for people who is working on exterior scene with water and glass materials involved.
Even if there is no improvement on XVGI itself, combining with UE 4.12 is a great improvement because some of important features have been achieved in 4.12 such as planar reflection and cubemap improvement.
Still, I have a question about VXGI. After days and days tweaking the options in VXGI, I finally get VXGI to work at the same cost of LPV GI in my scene. All VXGI features take 2.4ms to render. However, I noticed that VXGI opacity takes 0.81ms to render in GPU profiling. I wonder what VXGI opacity does, why it consumes so much power and how we can do to reduce the cost of it.

VXGI opacity is the opacity voxelization pass. It renders all scene geometry into a voxel texture that represents approximate amount of geometry in each cube of space. There are different ways that may make it faster:

• Make some materials used for small and high-detail meshes non-voxelizable (set Used with VXGI voxelization = 0 in material or instance parameters)
• Disable tessellation during voxelization (in case it’s enabled, also in material parameters)
• Set r.VXGI.Opacity6D = 0
• Reduce r.VXGI.MapSize
• Make sure that r.VXGI.NvidiaExtensionsEnable = 1 and r.VXGI.GSPassthroughEnable = 1 (these are the defaults)