You can revert clouds back to volumetric ones by executing this script:
private _display_menu = findDisplay 46 createDisplay "RscDisplayInterrupt"; // ESC menu
ctrlActivate (_display_menu displayCtrl 301); // Pressing "Video" button
ctrlActivate (findDisplay 5 displayCtrl 2); // Pressing "Cancel" in Video menu
_display_menu closeDisplay 2; // Closing ESC menu
Pressing "Cancel" button in Video menu makes engine re-init the clouds, reverting results of this command. Make sure its in unscheduled environment, otherwise players might see flashing menu and you'll have a serialization error message.