A quick look at the latest update to SkyCard for UE4. While the older version sees clouds casting volumetric shadows on themselves from a directional light, this update attempts to also transfer sunlight and sky color into the clouds as well allowing for a dynamic day-night cycle with little input needed. You will need Unreal Engine for this feature as the update is designed to work with the new Sky Atmosphere Actor. If you are interested in SkyCard you can get it here:
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