Retrieving 3D Tree::Draw("a:b:c") result

Dear Rooters,
I quote from the On-line "Reference Guide" TTree::Draw() method description:

<<For a three and four dimensional Draw the TPloyMarker3D is unnamed, and

   cannot be retrieved.>>

is it always true, even in the newest ROOT version?

any plan to change?

Acutally, I practically can affect the characteristics of a family of TPloyMarker3D via the TCanvas Editor.
Infact: let's superimpone various 3D-TTree::Draw() result onto the same TCanvas.
How?
  by simply clicking with the mouse onto a marker belogning to one family of the drawn TPolyMarker3D markers

Unfortunately I should do it automatically in a programmmm

  Finally, any suggestion how to get acces to the desired TPolyMarker3D ( in order to change their colour, size, style)?

//----
System used : Mac OS X
ROOT version: 4.02/00
gcc version : 3.3 20030304 (Apple Computer, Inc. build 1640) //---

Thanks a lot!!
Tommaso

--
Dr. Tommaso Chiarusi

Sett. Astroparticle Physics, Gruppo NEMO
Dipartimento di Fisica  Universita' di Roma "La Sapienza"
INFN - Sezione di Roma 1
P.zle Aldo Moro n.2 00185 Roma, Italia

Tel. Uff.  +39.06.4991.4408