I’m generating a level using blueprints with instanced static meshes.
But the navmesh doesn’t seem to affect the newly generated level.
What should I add/do to let it affect it?
It appears to be generating only a single navmesh tile. To verify, you can change the tile size UU in the levels recastnavmesh actor. if it changes sizes based on the tile size, then that is what you are seeing.
Assuming that is what you are seeing there are some posts about it, but no actual solutions. The best i have come up with is the place a static mesh plane under the level and scale it with the navmesh to cover the whole level. That causes the navmesh to be generated. My project has some issues with nav not going around non-navigable ISMs so i cannot guarantee this will result in a working solution - but it does get the navmesh to generate over the whole level.