NVIDIA GameWorks Integration

[ThaLobsta]

@.;309856

Hi ,

I’ll bring your post to the attention of the VXGI team, I don’t have an answer to your question about the map size, or the bug.

Regarding the license, you are covered by the UE4 End User License Agreement. By submitting the code into the UE4 code base on a fork owned by Epic, we are following the terms of the EULA on our side, and you are entitled to use it like any other in UE4. Of course, NV would love to get an advance peek at your game, etc. Feel free to send me a private message if you want to discuss the business side of things in more detail.

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Great, thanks! is just for fun, but 's a build: ://www.scheidecker.net/BrickGame-VXGI-2015-06-12-17.00.rar

@;310002

The emissive voxels going white most likely means VXGI is using UNORM8 emittance, i.e. non-HDR, and it gets saturated when it gets brighter. To get best results, we recommend to set bVxgiStoreEmittanceInHdrFormat=true in BaseEngine.ini. option changes the emittance format to FP16 (on ) or FP32 (on other GPUs). You can also experiment with VxgiEmittanceStorageScale option (same location) and see if there’s a setting that looks good with non-HDR in your case.

I actually increased VxgiEmittanceStorageScale already to fix the brightness, and didn’t notice it fixed the saturation as well. Sorry, my mistake! FP16/FP32 is way overkill for me.

@;310002

We certainly can add a tint for the cubemap, and cubemap support for diffuse ambient lighting. I’m not so sure that the ambient term multiplied by final opacity will look well, though, but it’s easy enough to try.

That’s what I did in SVOGI, and it worked well. Shadowed sky lights for free! Though to be clear I multiplied the total transmission of the cone by the ambient lighting.

@;310002

We also had the idea of using cone tracing instead of shadow maps, and there was an experimental version like that. It was much slower than shadow maps, and the quality was much worse. So I guess we’ll need to improve cascaded shadow map sampling during voxelization.

I’m sure it wouldn’t be as sharp, but that’s fine for my purposes. I would actually be happy with softer directional light shadows. Have you considered creating a signed distance field from the voxels and using that to skip samples for the the narrow cone traces? Apparently Tomorrow’s Children does that to accelerate tracing reflection cones, but I imagine it would help shadow traces just as well.

Thanks for your help!