[Warmonger]

There's a number of things about trees which don't make sense to me.

First is the pinhole effect. If you make a hole in a sheet of paper with a pin and hold it up to your eye you can see a lot through the pinhole. But if you move the paper a few inches away you can't see anything through the pinhole. Trees work the same way. If you are near a group of trees you can see through them, provided they're not too dense. But if you try to see through those same trees from a couple of hundred meters away you won't be able to see through them. In the attached example that should have been the case since the sighting unit was four hexes from the trees.

The other thing which doesn't make sense is that sighting obstruction would be intermittent on flat terrain. If sighting is blocked at a hex then all hexes beyond that hex should be blocked also if they're the same height. The same should hold true of visibility. If a hex is visible then hexes beyond it should also be visible up to the sighting range if the height of the hexes is the same.

Finally, I've encountered many cases where units will fire at each other for a few rounds in a turn and then suddenly can't see each other. The following turn they will see each other briefly and then not see each other again. In every case where this happens trees are involved. I have never seen it happen in clear terrain or where other obstructions such as buildings are involved even though the units are firing through visible smoke.