COHERENT DATA SHARING

Data structures within a shared computer-generated environment, are updated. A user terminal has memory a processor, input, network connection and a display. The memory stores data structures and instructions. The instructions configure the processor to supply an output image on a frame-by-frame basis to the output display by rendering the data structures. The data structures are updated in response to input data from another network-connected terminal or in response to delayed locally-generated input data received from the input. The data structures are extrapolated to produce output data if the data structure has not been updated in response to network input or in response to delayed locally-generated input.