Unreal Engine 4.6 NVIDIA VXGI Shows Breathtaking Visuals

Archie Paras
Apr 4, 2015

NVIDIA has recently introduced its new Dynamic GI called VXGI. VXGI has been integrated in a separate branch of Unreal Engine 4, and 3D artist “Byzantos” shared his results after experimenting with the new solution.

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Byzantos claims that NVIDIA VXGI is the most accurate solution available today. you can view some screenshots of his work, in the gallery below:

Byzantos’ notes regarding Nvidia’s VXGI:

So what gives? Is this relatively new dynamic GI method worth giving a closer look? I reckon it is! Currently the most accurate solution available. Nothing else comes close if you’re talking about quality versus performance. Even though still a beta, it already impresses with really good colorbleed, AO and its single light bounce. Add to that NVIDIA is looking into integrating a second bounce whilst improving the output and you’ve got a really strong contender for dynamic GI in games and maybe even Arch-Viz.

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  • Accurate ColorBleed from Diffuse
  • Ambient Occlusion (as opposed to Screen Space Ambient Occlusion)
  • Stunning GI from Emissive materials
  • Specular tracing offers an interesting alternative to SSR
  • Looks fairly good on low-settings/low-performance impact
  • Can look incredible on high/extreme settings
  • Excellent tweak and management controls
  • Fairly good range before quality degrades


  • Requires recompile of Master-Materials for Voxelization
  • Recompiling Master-Materials takes longer than acceptable.
  • Terrible stability when scene includes animated assets.
  • Prone to small lighting errors even on fully static scenes.
  • No GI from particles.
  • Does not support all Material types.
  • Specular tracing yields rather low resolution for reflections.
  • Small objects still need SSAO and SSR or will ‘float’.
  • Can be tricky to tweak for scene-specific circumstances.
  • Separate Unreal Branch, lagging behind core developments.
  • Slim chance of ever getting integrated into main branch.

In short: Promising.
When it works it looks really good.
It does however come with a few strings attached so to call this production-ready
is simply too soon. I’ll be keeping my eyes on this one for sure!

Nvidia’s GI solution appears to be quite amazing, and its implementation in the Unreal Engine 4 is definitely great news. Lets hope that we get to see the solution implemented in games pretty soon. We will bring you any new information on Unreal Engine 4 and NVIDIA’s VXGI, as soon as it becomes available. You van check out our previous Unreal Engine 4 coverage for more, here and here.




Source: Byzantos, DSOG