Systems and methods of virtual world interaction

An apparatus comprising;

• a computer processor;
• and
• a memory holding instructions configured for execution by the processor to cause the apparatus to:
• instantiate a three-dimensional scene defined by a collection of document objects, wherein the document objects are encoded in a markup language and define respective three-dimensional modeled objects or spaces;
• receive respective signals from two or more client devices each depicting respective versions of the three-dimensional scene, the signal indicating a change to a respective version of the three-dimensional scene associated with the client device transmitting the signal, the signals including a first signal received at a first instance of the three-dimensional scene from a first client device and a second signal received at a second instance of the three-dimensional scene from a second client device, the first signal and the second signal each indicating a change to an object included in the collection of document objects;
• determine a sequence of states for the object over time based on the indicated respective changes from the first instance and the second instance;
• record a sequence of three-dimensional scene states based on the determined sequence of states of the object at successive times of a time sequence, including at least position and orientation of the object modeled in the scene;
• and
• provide data representing the sequence of three-dimensional scene states to the two or more client devices, such that upon application of the sequence of three-dimensional scene states, respective instances of the three-dimensional scene associated with the two or more client devices include a synchronized scene state.