Do you have a working version 9? I too used to export most terrains in all formats. Been awhile, but couldn't you load a tiff, or did we have to convert from BMP? My old TG9 file has Terra Painter even, but I am missing codecs or Vis basic and it no longer works with latest Win10 reset.Can you somehow split RGB? This is a Dune cyphyr question, or Oshyan.
You can do that displacement with an inverted crater and a strata and outcrops.Change the angles in tilt.