An idea:

  Clicking and dragging on the preview window, perhaps with some hotkey
pressed (as to not to interfere with the partial preview selection)
could rotate the OpenGL camera around the look_at point. This way you
could quickly view the wireframe of the object/scene from different
sides without having to edit the scene file itself. Perhaps with another
hotkey the camera distance from the look_at could be modified.
  If you have ever used Moray, you'll know what I'm after.

-- 
plane{-x+y,-1pigment{bozo color_map{[0rgb x][1rgb x+y]}turbulence 1}}
sphere{0,2pigment{rgbt 1}interior{media{emission 1density{spherical
density_map{[0rgb 0][.5rgb<1,.5>][1rgb 1]}turbulence.9}}}scale
<1,1,3>hollow}text{ttf"timrom""Warp".1,0translate<-1,-.1,2>}//  - Warp -

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