Floating glb when Imported into THREE scene

When I load glbs they seem to be floating and not touching the ground, I am using cannonjs for physics. Any ideas? I have checked and exported the models from different software. Thanks

Most likely the shapes of your cannon bodies don’t represent the shapes of your meshes at any time.

Basic example : Cannon Physics - SBCODE Editor

More info : Physics with Cannon - Three.js Tutorials

To help visualise what the Cannon World sees versus what Threejs sees, use a debug renderer.

Example : Cannon Debug Renderer - Three.js Tutorials