Use “Add->Group” to insert a new object of type THREE.Group. You can then move existing objects into that group via drag’n’drop.
I would use a content creation tool like Blender to create my 3D models and export the final result to glTF. It’s the recommended 3D format of three.js, see three.js docs
Thanks Mugen87, Drag’n’drop is the first thing I tried.
It doesn’t work on Chrome Version 68.0.3440.106 (Official Build) (64-bit) Mac OS X. I see now it works in Firefox.
Not working on: Chrome Version 68.0.3440.106 (Official Build) (64-bit) Mac OS X.