Private until you say otherwise
An upload is yours alone. Publishing is a separate step, and it asks which licence the model goes out under.
Your models, kept somewhere they can be opened
Upload a glTF, an OBJ or a flutter3d project, and it is here on every machine you sign in from. Open it in the browser to look at it — the same renderer the engine ships with draws it, on WebGPU where the browser has it.
Checked before it is stored
The server reads every upload with the same decoders the editor uses. A file that does not parse never reaches the disk, and the triangle count comes from the file rather than from whoever sent it.
Attribution travels with the file
A published model carries its author and licence inside the exported file, not only on the page it was downloaded from.