export heightmap from ES to blender>
in Blender save image as an openEXR(32 bit)>
reload the image(IDK why it doesn't always recognize the bit depth)>
using paint tools in blender smooth it a bit>
Add a plane>
enter edit mode it top view>
unwrap plane(project from view UV bounds)>
subdivide plane(as much detail as needed)>
exit edit mode>
apply a material with the image as a texture>
apply a displace modifier(use the texture as displacement)
apply the displace modifier(click apply...finalize)>
export to MED>
Rotate model so up==up>
convert to terrain>
save HMP.