Which .ply files are supported?

A .ply file can contain very different things. Only Gaussian Splat PLYs can be explored as photo-real scenes.

Accepted

• Standard Gaussian Splat PLY (binary little-endian) with, per splat: position x y z, opacity, scale scale_0..2, rotation rot_0..3, base colour f_dc_0..2, and optionally spherical-harmonic detail f_rest_* (0, 9, 24 or 45 values = degree 0–3). All values must be 32-bit floats.
• Compressed PLY produced by PlayCanvas SuperSplat (with chunk and packed_* fields).

Rejected, with an explanation

• Ordinary point clouds (only positions and RGB colours), e.g. from a LiDAR scanner or photogrammetry. You can still add these to a tour with the Point-cloud viewer POI: choose Keep as point cloud on the rejected file.
• Meshes (files with faces): use them as 3D model POIs or as collision proxy geometry instead.
• ASCII or big-endian splat PLYs: re-export as binary little-endian.
• Truncated files: the header promises more data than the file contains. Re-upload the original.

Size limits

Your plan sets a maximum upload size and total storage. Very large scenes (several million splats) load more slowly on phones; consider trimming unwanted areas with clipping volumes or exporting a lighter version from your trainer.