Can we Merge imported terrain to d5-2.9 terrain

Hi,
is there any way to merge imported terrain to D5-2.9 ver Terrain

Hi there, if you have a height map for your terrain, you can upload it through the ‘Manage’ function of the terrain.
Alternatively, you can merge your custom terrain objects with the terrain in ver.2.9 by modifying the height map of the ‘Heightmap Resources’ in the D5 Asset Library.

Thank you for your quick help