I thought of limiting the comma between players and host by changing how often they receive updates. If the screen is 2000 pixels wide and a character takes up the whole screen at 1 meter then at 1/(2000/(d)) it will only have a pixel of change for a meter of movement so if the maximum speed is 1 m/2s you don’t need to worry any more than every 2 s. Also for bullets you would have a last agreed upon position received and sent between each player so they know who their bullet cone effects that they have to sent trigger updates to. The width grows linearly but the area of the screen that we need to worry about updating grows inverse squarely 1/(2000/(d^2)).