This is the style that would be used if a 3D structure were to be built inside, say, a monastery. The full elemental disks cannot be represented, and so they are modeled following the same style as in the 2D maṇḍala.

The Edward Henning Collection

This video animation of the Kālachakra mandala is part of the collection of works on the Kālacakra that the late scholar Edward Henning put together.  It is used with permission of the Estate of Edward Henning.  The original can be found on Edward's site, kalacakra.org.