face_off, This is a combination of two problems I think. Firstly, did you set & restore a morph target in ZBrush for this? If not, then the base cage is going to have differed slightly & hence the displacements are going to be out of whack (as you experienced). If you need clarification - feel free to buzz me on this. The other problem I think is perhaps due to the scale of the displacements used. For example, the flexing picture you linked to has quite alot of muscle bulk. This is something I would have implemented through a combination of a morph target (the altered 'level 1' cage from ZBrush) & the displacement map. Typically, I join my mesh into one solid "whole" (the java-based Compose tool is great for this) before importing into ZBrush, export both the altered mesh & displacement map, then use the altered mesh as a morph target & the displacement map on top for the "finer details". It can work quite well when you use this methodology!