SOG to PLY Converter

When downloading 3D Gaussian Splatting models from web showcases built on PlayCanvas or SuperSplat, assets are commonly packaged as .sog containers.

If you need to incorporate these models into desktop 3D training pipelines (like Nerfstudio, GSplat, or Gaussian-MCMC) or render them inside DCC software like Blender, decompressing the SOG container back into a standard Stanford PLY point cloud is required.

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Decompression Workflow

[PlayCanvas SOG Container]
├── 1. Unpack Morton-Order Spatial Octree
├── 2. Decode Embedded Texture Buffers (Positions, Colors, Quaternions)
├── 3. Reconstruct Uncompressed Single-Precision Floats
└── 4. Assemble Validated Binary PLY Header & Vertex Array

Output Component	Format Standard	Purpose
Header	format binary_little_endian 1.0	Compatible with all standard 3D Gaussian tools
Geometric Points	x, y, z (Float32)	Exact original spatial position
Color Channels	Spherical Harmonics $f_{dc}$	Preserves native color and view reflectivity
Anisotropy	scale_0..2, rot_0..3	Complete 3D covariance ellipsoid shape

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How to Convert SOG to PLY Online

1. Drag and drop your .sog file into the FreeConvert3D workspace.
2. Select PLY format.
3. Click Convert & Download .PLY to extract the full uncompressed point cloud.