Hey there my 1st post! 
I have a question about HD SUbD levels & 3D Export, can anyone answer??
I want to know if I have HD SubD levels on my ZTL Model with all my nice alpha detail
and want to export for 3d print.
Will the HD Levels on Detail export in the ZTL File???
cheers,
Andy H
i hope so i have some kind of a similar question. or at least a way to transfer most of the detail to a printable subtool
Try it and report back. Export your STL then open it in Meshlab and see if the detail is there.
It looks like the HD subdivisions are bound to zbrush rendering and map exporting.
i dont think they can subdivide the mesh on export, not with stl or obj it seems,
this is how i solved it.
take de base mesh from which you did all the hd sculpting, clone it subdivide it to the max amount of standard subdivisions, then project all the details from the HD sculpt, decimate, export, print.
you are not going to get full detail, but you can get good results.
hope it helps.