Cloud Phase parameter

[Cinemike]

In my tests I found that the Phase parameter for the new clouds doesn’t do anything for the cirrus clouds but for the stratus and cumulus type ones. I think it should be relocated in the GUI.

The seed parameter also does not alter the cirrus population / distribution. It’d be nice if it did.

[Core2000]

Seed also do nothing to cirrus clouds

[tom_grimes]

Correct on both counts - Cirrus are generated by a different means (think of them as more like a static map), so seed and phase do not affect them.

[beanzvision]

^Yep. To get some variety from the Cirrus clouds you’ll have to adjust the clouds offset.

[Cinemike]

So my point still stands: Phase has no justification to be placed right to the Cirrus amount because it does not do anything related to this type of clouds.
It is just misleading.

[beanzvision]

Phase determines minor perturbation of the clouds to simulate their change over time. This can be useful for animations or timelapse style renders.
https://support.chaos.com/hc/en-us/articles/8782365946513-How-to-use-Corona-Sky-Clouds-C4D

[lllab]

any hint how this redish cirrus clouds are made?

[tom_grimes]

Should just be the sun very low in the sky, perhaps even below 0 degrees.

[Cinemike]

"Amount: The amount of the main clouds such as Stratus, Cumulus, Cumulonimbus.

A value of 0% means there will be no clouds in the sky, whilst a value of 100% means the sky will be fully covered."

[beanzvision]

@Stefan-L

https://support.chaos.com/hc/article_attachments/8827418898961/sunset_clouds.jpg

any hint how this redish cirrus clouds are made?

As Tom mentioned, drop the sun below the horizon to illuminate high altitude clouds. Here I set it to -2.