Simulation freezes after exiting fullscreen mode in VR Sink (Simulink Desktop Real-Time)

Hi everyone,

I’m running a Simulink Desktop Real-Time model that includes a VR Sink block (from Simulink 3D Animation) to display a virtual world. Everything works fine until I open the VR viewer in fullscreen mode.

When I exit fullscreen, MATLAB immediately shows an error in the Command Window, and the simulation freezes, it doesn’t continue running, and I have to stop and restart the model manually.

This happens consistently. Here are some details about my setup:

• MATLAB version: R2024b
• Simulation mode: Simulink Desktop Real-Time (External mode)
• run in Kernel

I’m aware that in newer releases (R2025a and later) the VR Sink and related blocks are no longer supported, replaced by the new Simscape / Simulation 3D environment. However, I must use Simulink Desktop Real-Time, which currently does not support the new 3D blocks, so updating is not a viable option for my setup.

I need fullscreen rendering for human–VR interaction experiments, so I can’t avoid fullscreen mode.

Has anyone encountered this problem before? Is there a known workaround or patch for using fullscreen in VR Sink + Simulink Desktop Real-Time?

Thanks in advance for any suggestion or insight!