Hi Everyone .I have problems when an export models with the custom heads from blender to cc3 
I use cc3 tool blender export character FBX to blender and I Custom head in blender but when I export from blender to cc3 I have problem
I can try with morph import in cc3 but when I import head and body to cc3 not working 
I need help because I future I have many characters with custom head 
I blender I use Facebuider and add many image create mesh head 
 

Facebuilder will create a mesh that is different from the CC head mesh, so it is not compatible.

The only thing you can do in Blender is sculpt a CC head to change the shape, as long as no subdivision is involved and vertex count and order are preserved.

I think there is a way in Blender to "imprint" the shape of one mesh on another, but I don't remember what that is called.

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Yes, a good artist would probably sculpt it rather fast.
For the rest of us it is a real pain to transfer a head shape between objects with dissimilar UV maps.
Though possible with multiple passes of either Shrinkwrap modifier, or Mesh Data Transfer add-on.
In either case a lot of preps needs to be done to the target and source meshes for "successful" transfer.
And then a lot of tweaks/sculpts afterward to perfect.