Managed to export it via FBX. But I can`t convert it to terrain because it`s "no regular grid". I think that`s because the vertices aren`t equidistant.
Think there`s no way to get it converted to a hmp?

So let`s go back to texturing. How to texture this mdl7 file now using a multitexturing shader? What`s the best method to get a nice Blendmap for it?