I have now gotten a version that I think is in a state to be released soon. See here https://youtu.be/LaxFmVwHI8o
The resolution is limited by the engines capability to render the map so what you see is most likely the limit. If I tried to go lower there were visual bugs under various conditions and this was the lowest that worked in all the cases I tried.
Additionally I released a mod onto the vault that should be used in conjunction with these maps called Unexplored Maps. This supplements the map by performing some work I could not do in the map script alone. It is not necessary per say but it does ensure a certain degree of fairness between players.
As seen in the video, props, mexes, and hydros dynamically spawn in when discovered so that you cannot see them until you find them.