Add set z height ACE

Add set z height ACE. This and height and width form a rectangular box used by the renderer to determine if the 3D Object is within the viewport to render. As an example of the size of this box, set 3D Shape as a box with the same z height and width, and height. Z height will not impact the size or shape of the 3D Object, it is only used for viewport clipping.

Thanks to FoozleCC for the observation and suggestion.