Could it be the pose that you are using.  I pose each item separately. The robe, the pants, and the headdress. I use the ManFriday  dForce Companion 2 found at the Daz Store. I just randomly selected a pose from the George Pose Collection.  Here are the settings I use:

Character is Arji

 

Here is the pose I used:

Here is my Rendered Image:

 

Here are the dForce Pane Settings

Can you show me your posed image, maybe I can reproduce it on my end.