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Comment by DizzyDoo | Hacker News Reader

Unreal actually already has an automatic LOD creation system (https://docs.unrealengine.com/4.26/en-US/WorkingWithContent/...), and there are quite a number of 3d Content middleware solutions that run this sort of mesh reduction processes. In one sense Nanite isn't anything brand new, but what is really exciting about it is that it operates from the sculpt downwards. As in, you import from zbrush raw, with the highest raw textures, and everything is automatically handled by the engine itself, in such a way that the LOD transitions are really hard to spot.

From what I've seen on Twitter, it looks like it really delivers, even in its early stage: https://twitter.com/IonizedGames/status/1397636481913610241

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Now that's impressive. Seeing the dog picture scale out is encouraging. All the LOD algorithms do a good job on rocks. It's all repeated instances of one object, though. I'd like to see someone load in a big game level at high res and give us a tour.

Quadric mesh reduction, where the algorithm tries to minimize the volume difference between original and reduce geometry, does great on rocks. Terrible on thin sheets like cloth or long thin things like hair. Mediocre on objects with lots of hard edges, like houses.

I've been trying to run the UE5 Early Access version on Linux. Building UE5 Editor worked, and I built and ran one of the built-in sample projects. But the files for the demo are only available for download via Epic Game Loader, which is only available as a 32-bit Windows program. Trying to run that under Wine leads to a popup complaining some DLL is missing. But it doesn't tell you which one. Some people have been able to get it to work, probably depending on what Windows DLLs they happen to have installed.

Trying to run Nanite on Linux produces a line of red text saying that the machine doesn't have a supported graphics card or driver. This is with a NVidia 3070 with the current NVidia driver on Ubuntu 20.04 LTS, which is about as good as it gets today.

It's a typical "we tossed the Linux users a crumb" port. Well, it's early access. Filed all the appropriate bug reports.

> This is with a NVidia 3070 with the current NVidia driver on Ubuntu 20.04 LTS, which is about as good as it gets today.

Driver installed by “hand” or via the Ubuntu packages? More importantly: What’s the output of nvidia-smi?

Ubuntu packages. Driver version 460.73.01 Cuda version 11.2. GeForce RTX 3070.

Hmm. The Linux statement for UE4 just says “use latest stable” [1] (which is why I always just download the .run file and install “by hand”).

But your driver was released in April. While there are a lot of serious-ish sounding issues fixed in the 460.80 series [2], I sort of doubt UE hardcoded that. Then again, UE now relies entirely on Vulkan and it feels like every NV driver release has fixed at least one major Vulkan bug, so maybe since they just released it they are asking folks to use 460.80+?

[1] https://docs.unrealengine.com/4.26/en-US/Basics/RecommendedS... (then select Linux from the drop down icon I guess)

[2] https://www.nvidia.com/Download/driverResults.aspx/175203/en...

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