Techniques are disclosed for rendering graphical content, e.g., in an extended reality (XR) environment, that provide for a creator (or recipient) of a 3D object markup file, e.g., a user operating an electronic device configured to be aware of the structure and organization of the 3D object markup file's format, to: create a 3D object markup file; reproduce a 3D object for display, along with its corresponding markup information; toggle the markup information on or off for display; and/or make further updates to such markup information with complete reproduction fidelity and accuracy. Techniques herein also provide for the sharing of 3D object markup files (including any persistent markup information) with other users, e.g., asynchronously or in real-time, allowing for collaboration in the process of marking up virtual 3D objects. The 3D object markup file may also be exported, such that the markups are no longer editable or toggleable for display.