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About navmesh. Have you ever noticed message like ‘NAVMESH NEEDS REBUILD’ while playing a game? I think the initial navmesh is built during the ‘Build’ phase. If you check ‘update at runtime’, I think it updates the already built-navmesh to accomodate moving/dynamic elements. I am not sure that the entire navmesh is generated at runtime. I will do some research and see how this is done.
Also how about foliage? Does foliage painting work on static meshes?
But like I said previously, I like tile-sets. It helps to generate terrain faster. And with some Material instance tricks, we can switch an existing map to different themes (autumn, winter, summer…). All we need is to change the texture and some other material params.
UPDATE: Found this: Dynamic navmesh - Feedback & Requests - Epic Developer Community Forums Looks like generating Navmesh at runtime is possible. However we should create Navmesh volumes for it to work. Perhaps we can make tiles a blueprint and when placed create a volume. Is it possible>?