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Splataverse NextGenMinimal
Large Unreal-Engine-derived scenes (USD) converted to tiled Gaussian splats (.spz, SPZ v4, degree-0 SH).
| scene | Gaussians | tiles | tile edge | size | notes |
|---|---|---|---|---|---|
| OldTown | 7.0M | 2 | 128 m | 16 MB | city block, no instancing |
| park | 441M | 36 | 256 m | 3.5 GB | 41.6M plain terrain + 2.7M foliage / prop instances |
| Mountain | 178M | 16 | 512 m | 1.2 GB | 47.8M plain terrain + 0.5M instances |
previews/ holds one fly-through video per scene.
Layout
<scene>/manifest.json
<scene>/tiles/tile_xNNN_zNNN.spz
previews/<scene>_flythrough.mp4
manifest.json lists every tile with its origin, local bounds_min/max, Gaussian count and size. World position = tile position + tile origin.
Frame: metres, Y-up, right-handed (converted from Unreal's Z-up centimetres). Tiles are ground-plane (x/z) squares; positions are stored relative
to the tile origin because SPZ's fixed-point range is about +-2047 m.
How it was made
Meshes are sampled into Gaussians on the surface (splataverse.convert_mesh): 100 Gaussians/m^2 for plain meshes (capped by triangle count) and 50/m^2
for instanced prototypes (12 to 100k per instance). Each PointInstancer prototype is converted once and placed per instance (position, rotation,
mean scale). Colours come from the base-colour texture (Omniverse MDL base colour or UsdPreviewSurface); cut-out materials (leaves, grass, fences)
drop Gaussians whose texel alpha is below 0.4. Opacity is a constant 0.99. The sky dome is excluded.
Known limitations
- Landscape layer blending is not reproduced: terrain uses its first albedo layer (Mountain's ground is one uniform texture, OldTown's landscape is flat grey).
- MDL UV-tiling inputs are ignored.
- Anisotropic instance scales are approximated by the geometric mean of the singular values (park: 479 instances, Mountain: 8).
- Colours are base colour only (no lighting, roughness or normal maps);
OldTownCleaned,materialsand Mountain's bbox variants were not converted. - Source license is not stated in the source files; access is gated until the owner confirms terms.
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