I use Zbrush and Modo for morph creation.

Sometimes it is useful to see what your morph is doing to a texture while you are creating the morph. For example, when adjusting an eyelash to fit on an eyesClosed morph, you would want to shape it without completely warping the eyelash texture. (This kind of thing can be done by exporting the part from Poser with the uvs, I've remembered.) Of course, if you want to track texture distortions that span two or more parts, you might be out of luck currently. 

Download my free stuff here: http://www.renderosity.com/homepage.php?page=2&userid=323368