Just adding my own thread here. I noticed there were some others which I responded to.
I also am having white areas show up in my displacement map exports around my UV seams which I do not want.
I have tried storing the morph target and switching back which doesn’t work and also using the crease button which only adds a worse condition to the displacement map around every polygon.
All I want Zbrush to do is make displacement exports where I actually put brush strokes down. I realize that when subdividing that the mesh will have some difference between the hi and lo res which is what I believe causes the difference in grey color value but I think Zbrush should only account for actual brush strokes which would then allow me to just add what I need instead of end up with a result I have to correct in photoshop.
Thanks for any help with this. 
