Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] Daily Builds => Topic started by: Cinemike on 2022-10-13, 21:46:38

Title: Cloud Phase parameter
Post by: Cinemike on 2022-10-13, 21:46:38

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.

Title: Re: Cloud Phase parameter
Post by: Core2000 on 2022-10-17, 12:06:23

Seed also do nothing to cirrus clouds

Title: Re: Cloud Phase parameter
Post by: TomG on 2022-10-17, 14:08:28

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.

Title: Re: Cloud Phase parameter
Post by: Beanzvision on 2022-10-17, 14:32:54

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

Title: Re: Cloud Phase parameter
Post by: Cinemike on 2022-10-17, 16:23:42

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.

Title: Re: Cloud Phase parameter
Post by: Beanzvision on 2022-10-17, 17:32:12

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

Title: Re: Cloud Phase parameter
Post by: Stefan-L on 2022-10-17, 20:03:05

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

any hint how this redish cirrus clouds are made? :)

Title: Re: Cloud Phase parameter
Post by: TomG on 2022-10-17, 20:08:21

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

Title: Re: Cloud Phase parameter
Post by: Cinemike on 2022-10-17, 22:30:00

"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."

Title: Re: Cloud Phase parameter
Post by: Beanzvision on 2022-10-18, 08:32:34

Quote from: Stefan-L on 2022-10-17, 20:03:05

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. :)

(https://forum.corona-renderer.com/index.php?action=dlattach;topic=38096.0;attach=173013;image)