/!\ Warning /!\: Regarding saves made prior to R3:
If when you load a previous save, you get a sort of empty screen, this is normal, just move to another location (by clicking on where you should be one of the navigation hotspots (the grey smoke) or using the map) and it will reload correctly the files. This is caused by some optimization made, I reworked the whole organisation for the backgrounds in the game and for future versions.