I’ve never heard of a getOrCreateObject3D() method. What framework/library are you using next to three.js? Besides, please share the version of your three.js copy.
I’m working on a project on 8th Wall using A-Frame and Three.js. And I’m using a component called “text-geometry” which generates extruded text, which is where that line is coming from.
These are A-Frame methods, not provided by three.js. I’m not sure how many people on this forum can help with that, you’ll probably have to try these options: Community – A-Frame