OpenGL rendering has been improved substantially in VectorWorks 2008. OpenGL is one of the fastest rendering modes and when you use the walkthrough tool it is the rendering mode that stays rendered as you walk through. So, it has been a useful mode, even if it is a bit low-fi.
The improvements let you add lines to your OpenGl render and shadows. Notice that I’ve got shadows on the ground, even though i don’t actually have a ground.
Check out my revised manuals at http://www.archoncad.com