Hi, I'm new to Unity and I'm trying to build small semi-open city. The city has some natural parts, like grass, a small park alley, hills(with buildings on top) and there is a forest and a river outside of the city. I can't figure out, if I should use one big terrain - but then a lot of terrain parts will be under roads and buildings, damaging optimisation. - or several small terrains, seems like the most logical, but I'm not sure how many terrains I can use with Unity without breaking a system or not to use terrain at all - river, hills and park alley soil will be replaced with concrete. It will make city look more industrial and perhaps more scary, which is good for my horror game. I would love to hear you responses!!! I also own Gaia, but I don't think it can help with the dilemma. Edit: I also own infiniGRASS, which is supposed to help to create grass on any surface, so I thought, if I should make soil and natural parts using 3d models, rather than Unity's terrain. P.S.: I hope, I'm using the right subforum.