Grainy and pixelated clouds are not fixed. Pretty annoyed that the latest Dev Update says it is fixed when there are multiples of people still experiencing this. Yes it was fixed with that initial patch that was released to fix it, but in the previous months the issue has returned.
There is no special way to reproduce this, it occurs all the time in any cloudy environment, particularly when going through and above the clouds.
RTX 2070 super, 32gb ram, Ryzen 53600.