Hey! It's using three.js with rapier for physics. The models are being loaded as STLs using the three.js stl loader https://threejs.org/docs/#STLLoader.
This is true. So far, everything I have printed has fitted on the plate. However, for larger items you can split them on the slicer and include connectors to join them back up - I'm yet to try this though
https://github.com/Brookke/brookke.github.io/blob/main/src/c...