Visibility Distance Increase
NOTE: These are GLOBAL values, they affect all Mech's even the AI's.
To Increase the Visibility Distances you need to edit your CombatGameConstants.json file located in BattleTech_Data\StreamingAssets\data\constants
Find the line that reads:
"BaseSpotterDistance" : 200.0,
increasing the 200 will increase your visibility range, 300 / 400 work well.
You may also wish to increase the range at which sensors work this is done using
"BaseSensorDistance" : 400.0,
Typically increasing it by the amount you increase the base spotter distance is a good idea.
Note: Editing to Visibility distances in excess of 550m will cause AI to engage immediately on smaller maps like River Crossing.