I would like to extract heightmaps from SWBF (1 or 2, doesn't really matter) along with the environment models to use in Unreal  Engine. I have been able to export weapons successfully using 3D Object Converter.

I have also been able to sort of extract the terrain using 3D Ripper, but that only exports the terrain as a model and not a heightmap (it is also inaccurate, and can only be used as a reference to reconstruct it in 3ds Max).

Were heightmaps used for terrain in BF1 or 2? If so, is it possible to extract them?