(Use DH shader version, from Iris Discrod)
Behaviour: When DailyWeather enabled, cloud shadows ignoring parameters from daily-day weather setting, but changing cloud density settings in Cloud section still has affect to shadows.

Some research:
Method GetCloudShadow() in volumetricClouds.glsl links direct to LAYER_DENSITY from settings.glsl. (As I understand)

I fixed that by some crutch - realising Daily_Weather dayCounter from deffered.vhs into volumetricClouds.glsl.

No idea how it must works correct (I not write Minecraft Shaders)

(In progress feature, didn't notice)