Saving surface3d Output

Are you talking about surface3d in the rgl package?  It doesn't use the 
standard R graphics system, so dev.copy() won't help.  You need 
rgl.snapshot, which can create png files.  You'll need some other 
utility to convert those to pdf.

Or screen-grab them somehow. In Windows: hit 'Print Scrn' - or is it 
shift-Print Scrn - then open a graphics program (Photoshop) and create a 
new picture and then 'Paste' it in. That'll give you the whole screen, 
so crop to size and save. There are other screen grabber utilities 
available.

  On Linux, I'd run Gimp and then capture the graphics window with the 
'Acquire... Screen Shot' function. Save as required.

Barry