Like for example a scout bird cant see units in Tree/forest tiles and dogs can sense units in forest like he would have lower sight but there will be a range where in all units in that area will be marked by a exclamation mark"!" To show that he can smell someone and some other Idea where in units cant see much in forest tiles like they will only have 2 sight and also an idea that tiles and units can change what you see. When a ranger cloaks everyone will see a bush
and I thougt of a unit that is wearing a deer pelt and holding a bow once the deer dude transforms to camo mode all players will just see a deer and the name will be deer and ive also taught of having different sights on cliffs like for example your beside a cliff, you would not see the top of the cliff and when your at the edge of the cliff you wouldnt see the bottom? Maybe?In conclusion:
I would like to have: terrain affects what you see and units can be seen differently by other players and other sight limitations