Hey Craig,
you will see this 3D toolpath simulation if you use the Onefinity Controller User Interface from a web browser of your choice from a remote computer that you connect via Ethernet or WiFi.
Remote computers usually have a more capable graphics card with 3D-accelerated drivers installed, which is not the case with the Raspberry Pi 3B inside the Onefinity Controller. The built-in 3D toolpath simulation is a very nice feature of the Onefinity/Buildbotics Controllers (note: the author of the buildbotics.com cnc system is also the author of camotics.org toolpath simulation software).
