<Nexus>
Traveler of the Multiverse
I just tested a workaround by adding ignoreterraindamage for grassland to Woodsman I and moved a unit to a distant grass plot but it still recieved the damage per turn. My plan was to create a promotion chain that enables further exploration on different terrains but that won't work.2) Tundras are safer than Grassland with the right promotion
Arctic Warrior I makes a unit immune to terrain damage on Tundras... and ML damage too. Same goes with Deserts and the respective promotion. But other terrain types (that normally don't inflict terrain damage) has no "immunity promotions" either. So with certain promotions you can go further on some terrain than on others.
Solution:
Either fix ML, so terrain damage and ML damage work separately OR apply terrain immunity to all terrains with promotions. (I'm leaning toward this second solution in my modmod)
So something is wrong in the way the game calculates distance damage when the terrain really does damage and a promotion gives imunity to it.