Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: studiodg on 2022-10-18, 22:42:23

Title: Volumetric scaterring
Post by: studiodg on 2022-10-18, 22:42:23

Hello,
I use Volumetric scattering,
on simple volumes work but on an extruded curve I don't have the same result

I have a transparent result with dark edges but on an extruded curve, everything is dark

Thank you for you help

Title: Re: Volumetric scaterring
Post by: romullus on 2022-10-18, 23:01:24

Did you check if the normals are facing in the right direction, i.e. outwards, not inwards?

Title: Re: Volumetric scaterring
Post by: studiodg on 2022-10-18, 23:11:27

Sorry i don't know, How to change the direction facing ?

Thank you

Title: Re: Volumetric scaterring
Post by: romullus on 2022-10-19, 10:56:51

The easiest way is to add normal modifier to the object and make sure that flip normals is checked on.

Title: Re: Volumetric scaterring
Post by: pokoy on 2022-10-19, 12:08:55

As Romullus said, this might be a normal problem, but could it be that the object has overlapping faces? Maybe the spline it was extruded from has multiple splines all in the same place?

Title: Re: Volumetric scaterring
Post by: maru on 2022-10-19, 14:16:02

I guess it's either flipped normals or the object elements are not welded (some unwelded faces).

Title: Re: Volumetric scaterring
Post by: studiodg on 2022-10-20, 19:35:49

Yes,
I created an arc then I extruded. Now I have several faces. how to render in one face?

Thank you

Title: Re: Volumetric scaterring
Post by: studiodg on 2022-10-20, 20:16:43

I found thanks. I only had one face. My extruded shape was not closed...
 Thank you because thanks to you I tried a lot of manipulation on my shape and not on the texture.
 Thanks for your help :D

Title: Re: Volumetric scaterring
Post by: maru on 2022-10-21, 15:32:42

The Shell modifier could be also useful here (it turns one-sided geometry into solid geometry by adding thickness).