Any way to increase the vertex count of a navmesh obstacle?

Hi all! Trying to simulate a turning radius for the navmesh agent by using some capsule obstacles to carve the mesh when the player tries to turn their ship. Is there anything I can do to increase the vertex count of these obstacles?

No matter how I bake the mesh, the game seems to treat them as octagons, and as a result, the ship moves in a series of straight lines around them instead of the desired smooth arc. I know 100% smooth is not possible but is there anything that can be done to turn up the vertex count on these so I get closer to a smooth arc?

See screenshot. Thanks!

Spent a lot more time playing with the voxel count and confirmed it’s not relevant to this issue.