The command 'setPiPEffect' claims that it it will set the visual effect of a renderer, however after trying this in the editor, it does not seem to have any effect at all.
Additionally, it seems that many renderers have the same name in their cfgVehicles entry, so how do we even tell the difference? That seems related.
If we had this command, we could use scripts to control PiP screens, such as changing between day and NVG without going into the optics view.