Since the last update of the editor I have been having a few problems. Firstly my AV program began blocking everything because the editor is saving files to my C; Drive Documents folder. I think I've fixed this but now have an issue with the weather / sky. In the editor the horizon has started flickering or shimmering. At first I thought this was due to distant texturing but even when close to an object like a building there is shimmering at the roof edges.(any edge where the sky is in the background - even loco chimney). I now realise there are actually clouds being drawn over the edges of the objects and that the lower clouds are quite coarse in appearance as shown here. The photo doesn't capture the flickering which makes working in the editor quite troublesome. I am using TOD 4. Is any one else having this problem or can anyone suggest if I can change anything in the sky dome or sky atmosphere settings to correct this. In Play In Editor mode the shimmering disappears but the sky dome (in rainy weather) is very coarse texture with visible banding in the grey areas. The shimmering comes back every time I restart the editor. This could be a problem with my Windows installation as there was a Windows update a couple of weeks ago which Windows aborted and uninstalled and I have had other problems since then. Thanks