Regardless of what settings I choose, all objects remain invisible in the shaded view.
Things I tried so far:
In Windows:
System - Display - Graphics:
- Let Windows decide
- Powersaving mode
- High performance
Uninstalled and reinstalled Parallels Tools, uninstalled and reinstalled graphics card driver.
In Parallels Desktop:
Settings - General:
- switched between configuration "Games" and "Design"
Settings - Hardware:
6 CPUs, 32 GB RAM, (up to 16 GB for graphics)
In Vectorworks:
- deleted VGM cache
- turned hardware acceleration off / on
It seems to me that the shaded view simply doesn't have access to DirectX, which (according to Parallels) should be emulated through Metal.