When you watch the pre-release showcase video of the weather, it is absolutely nothing what we have now. Update after update they have taken key areas of the live weather away such as wind gusts, to what we have now. A totally broken weather system that doesn’t look good or accurately depict weather.
Since the issue with the colour banding has been fixed with the live 1.21.18.0 build, it would be best to move discussions regarding grainy/pixelated clouds in the following thread instead.