[EXPLOIT] How to find geyser inside FoW

I don't think that's a bug, nor an exploit.

I would consider this exploitable, as it is showing what is in the fog.

As well, you can find out what shape a buried geyser is by placing build orders, partly identifying them by where you can't build;

2x4 is a gas vent, 3x3 is a volcano, and 4x2 is a liquid geyser.