I use Blender to make head morphs. The Blender sculpting tools work very well for that. I find them very easy to use. When importing and exporting obj files, it is important to select the option to retain the vertex order. If you bear that in mind, it is perfectly straightforward.

Poser 11 Pro, Windows 10

Auxiliary Apps: Blender 2.79, Vue Complete 2016, Genetica 4 Pro, Gliftex 11 Pro, CorelDraw Suite X6, Comic Life 2, Project Dogwaffle Howler 8, Stitch Witch