Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: mtanasiewicz on 2015-09-08, 13:45:31

Title: GodRays from sunlight that lits the scene from behind.
Post by: mtanasiewicz on 2015-09-08, 13:45:31
Hi,

Have anyone succesfully manage to achieve good loking godrays(volumetric fog) for example inbetween trees, when the sun lits the scene and is not visible in camera? Like when it lits the scene from behing the camera? I'm not a specialist on this case, probably it is not physically correct, but it would look nice :)
Title: Re: GodRays from sunlight that lits the scene from behind.
Post by: -Ben-Battler- on 2015-09-08, 13:52:23
It is possible. Read this article at the bottom, there you find how to set up the Global VolMaterial:

https://coronarenderer.freshdesk.com/support/solutions/articles/5000534910-how-to-use-subsurface-scattering-volumetric-absorption-and-scattering-

And in this thread it was discussed as well:

https://forum.corona-renderer.com/index.php/topic,8653.0.html
Title: Re: GodRays from sunlight that lits the scene from behind.
Post by: mtanasiewicz on 2015-09-08, 13:58:11
Thanks!
Title: Re: GodRays from sunlight that lits the scene from behind.
Post by: maru on 2015-09-08, 15:10:23
It looks like this is possible but requires a lot of experimenting, is not very apparent, and requires setup opposite to what works when sun is facing the camera. :)
Title: Re: GodRays from sunlight that lits the scene from behind.
Post by: -Ben-Battler- on 2015-09-08, 15:23:26
If you just decrease the fog distance it should work better, shouldn't it? As long as the cam is still facing the sun and the object which occludes the sun is not too big it should work without problem.
Title: Re: GodRays from sunlight that lits the scene from behind.
Post by: maru on 2015-09-08, 15:41:26
Camera is not facing the sun. It is lit from behind, as described in the first post.
Title: Re: GodRays from sunlight that lits the scene from behind.
Post by: -Ben-Battler- on 2015-09-08, 15:47:31
Sorry, one should read properly..