The SPB16.3 Allegro PCB Editor has a new 3D Viewer! 
Viewing a 3D rendering of the Allegro design is now available with the 3d_viewer (View — 3D View) command. The 3D Viewer is invoked in a separate window which includes viewing filters; choice of solid, wire frame or transparent graphics; and controls to pan, zoom, and spin the display.

The 3D viewer also operates in pre-selection mode. This mode makes it possible to display HDI via structures.

Multiple windows can be opened and each window supports a function to export a .jpg bitmap file.
The 3D viewer is available in Allegro PCB L and up and requires OpenGL to be enabled.
Visit the Allegro Product pages and watch a movie of all the capabilities!
As always, I look forward to your feedback on this new SPB16.3 feature.
Jerry "GenPart" Grzenia