Massing Models can show shadows based on a Document Preference called Plan Shadows. You can…
Vectorworks Tip 302 – Pad with Retaining Edge
Intermediate – Normally, you have to use a grade limits with a site modifier, but not when use a pad with retaining edge. In this image you can see a pad with a vertical retaining each. At the bottom you can see the red outline itches the pad, and at the top you can see the red outline which is the retaining edge. Vectorworks will create the retaining edge to sit at exactly the right height for the existing site model if you use the command Send to Surface.