Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: nodarchika on 2023-04-29, 13:58:57

Title: Corona volume grid object
Post by: nodarchika on 2023-04-29, 13:58:57

Hello my friend.

Can anyone help me regarding the corona volume grid object in cinema 4d?
There is no single tutorial or video about that.

I want to load some vdb files into it and render.
When I load file, nothing happens

Couldnt figure it out.

Really appreciate your help.

Title: Re: Corona volume grid object
Post by: Cinemike on 2023-04-29, 20:31:10

https://support.chaos.com/hc/en-us/articles/4528489581329-How-to-use-the-Corona-Volume-Grid-object-C4D

If you need specific help, somebody is (almost) always here.

Title: Re: Corona volume grid object
Post by: Beanzvision on 2023-05-01, 11:16:05

You rang? ;) Where are the files from? Please give us as much detail as possible. Screenshots are always welcome too :)

Title: Re: Corona volume grid object
Post by: nodarchika on 2023-05-01, 11:52:40

Here are the screens.
I upload vdf file and nothing happens.

Title: Re: Corona volume grid object
Post by: TomG on 2023-05-01, 13:05:24

Screenshots of your set up of the Corona Vol Grid object would be needed. Also would be some information on where the OpenVDB file is from (I presume you mean VDB when you said "vdf file"). Of course rather than do all that you can send us the scene file, which can be done via private uploader if the OpenVDB file is not one that can be redistributed to the public (depends on the license you downloaded it with). And as always, Corona and C4D version and OS are always necessary pieces of info too please :)

Title: Re: Corona volume grid object
Post by: Cinemike on 2023-05-01, 14:12:25

"Nothing happens" was the misleading part of your initial message - something IS happening, just not what you would have expected ;)
Make sure to have the "Enable" checkbox unchecked in the Emission tab of the Corona Volume Grid.
Make sure to have the "Enable" checkbox checked in the Absorption tab of the Corona Volume Grid. Set channel to "density".
Make sure to have the "Enable" checkbox checked in the Scattering tab of the Corona Volume Grid. Set channel to "constant".

Now the cloud shoudl be visible.
Read in the helpdesk about the paramerters.

Have fun.

Michael

Title: Re: Corona volume grid object
Post by: Beanzvision on 2023-05-02, 11:03:34

The steps given above should resolve your issue. Please give them a try and keep us posted. It does indeed work ;)

(https://forum.corona-renderer.com/index.php?action=dlattach;topic=39935.0;attach=182721;image)