RasterPropMonitor cameras stay black (only when turned on, otherwise work fine)

[jeancallisti]

Scenario :

• Get the ALCOR landing can
• go in IVA
• enable VR
• click on any of the buttons (except camera buttons) around the RasterPropMonitors to turn on some display. It works.
• click on the CAMERA buttons or DOCKING button to show an external camera view. --> PROBLEM: The screen displays text like "CCTV enabled" (which proves that the RasterPropMonitor logic works), but does not render the camera scene (which proves that it's purely a camera/scene issue).

Workaround :

• exit VR (stay in IVA)
• click on the same screen button, but with the mouse --> The camera view is now rendered on the screen, as expected.
• Re-enable VR --> The screen is still showing the camera view (works fine)