Combine manullly and procedural generated terrain

Hello,
I would like to generate part of world with perilin noise function and combine it with Unity terrain creation tool.
Is it possible/how to achieve that?

Thanks

One way is to iterate all the verts along an edge of your Perlin Noise mesh, and then generate a “bridge” over to match the terrain, and go below a bit.

The reason you (probably) need to go below the mesh is to ensure continuity with the Terrain mesh, which is actually dynamic with distance from camera.