Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: maze_sky on 2016-11-12, 21:35:50

Title: godrays
Post by: maze_sky on 2016-11-12, 21:35:50

following this tutorial:

t=8s
i can get a kind of undefined volume fog - but no godrays.
Also the values for distance in the volumetric material I played with to get any kind of volume fog are completely differnt to the tutorial.
I started to day with the 1.5.1 hotfix download a trial period.

I will attach my scene and a reference render.
Would be great if someone could point me to a solution.

Title: Re: godrays
Post by: maru on 2016-11-14, 15:42:02

Hi, sorry for the delay! I'll take a look at your scene tomorrow and see if I am able to find out what is wrong. I hope it's not too late...

Title: Re: godrays
Post by: C00P3R on 2016-11-15, 16:00:04

Not a useful post but personally interested in learning more about this, I also had problems getting 'god rays' in my scenes. I found having the sun within shot makes a massive difference, not sure if that helps you at all!

(Y)

Title: Re: godrays
Post by: maru on 2016-11-16, 15:51:09

Sorry for the delay! Fixed. The problem was with:
1. Absorption distance - this can be sometimes confusing, so some experimenting was required
2. After lowering absorption distance the whole background became black - it was fixed by changing environment distance in Render Setup > Performance > Development/Experimental stuff.
The godrays are not clearly visible in this scene, but they do appear if you move camera/sun.

Title: Re: godrays
Post by: maze_sky on 2016-11-16, 21:24:14

Thank you a lot.

Looks promising. Unfortunately I'm not using max 2017.

Can you save the scene downwards compatible to max 2014? Or at least max 2016?

Would be great. But you description should help me too.

Cheers

Title: Re: godrays
Post by: maze_sky on 2016-11-16, 21:52:57

I tried to find the Performace --> Development/Experimental stuff in Corona Render Setup Window...

...but it's not there.

Title: Re: godrays
Post by: TomG on 2016-11-16, 22:00:26

The devel/debug parameters are hidden by default - to expose them, go to System tab, click the System Settings button to open the dialog for system-wide settings (new in 1.5), and the checkbox for devel/debug is there. Check that, close the dialog, and head to the Performance tab and you will see those settings.

Title: Re: godrays
Post by: maru on 2016-11-17, 13:13:04

Sorry, I sometimes forget to save to an older version just in case. Here is the updated file.