It also has no meshes and no texture maps, only volumetric data.
Powered by Epic Games' Unreal Engine 5, the scene in question has no traditional meshes, no polygons, and no texture maps, using only volumetric data imported in NeRF and VDB formats.
According to the creator, the environment was set up using the UE5 project and NeRF data from TurboSquid, an online library of 3D models and tools, Luma AI's NeRF plug-in for Unreal Engine, shipped back in April, and the VDB tornado sequence from JangaFX's EmberGen, a real-time volumetric fluid simulation tool that allows users to simulate, render, and export flipbooks, image sequences, and VDB volumes.
As for performance, Jason noted that the scene runs at 40-120 FPS on NVIDIA's RTX 4090 GPU, varying widely based on viewpoint.
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