Fog

Thu Nov 12, 2015 4:43 pm

Hi,

I had understood that Octane does not have fog yet. And that is the case.
I´m working on a underwater dredging animation and was wondering of how to produce a murky greenish water under the surface. Normally fog would help to produce it. I thought I would have to use z-depth in post with Octane. But I knew that it would probably look awful.

Luckily I ran to this tutorial with specular material + scatter :
https://www.youtube.com/watch?v=lE433MAsZ4I

And it works perfectly! I get now good results with my animation natively in Octane (see my attachments). A big time saver (although it renders pretty slow, but with underwater scene I don´t care so much for a little noise)

I think this method should be in Octane-Lightwave manual as "Fog-workaround".

Fri Nov 13, 2015 8:56 am

Builtdown wrote:Hi,

I had understood that Octane does not have fog yet. And that is the case.
I´m working on a underwater dredging animation and was wondering of how to produce a murky greenish water under the surface. Normally fog would help to produce it. I thought I would have to use z-depth in post with Octane. But I knew that it would probably look awful.

Luckily I ran to this tutorial with specular material + scatter :
https://www.youtube.com/watch?v=lE433MAsZ4I

And it works perfectly! I get now good results with my animation natively in Octane (see my attachments). A big time saver (although it renders pretty slow, but with underwater scene I don´t care so much for a little noise)

I think this method should be in Octane-Lightwave manual as "Fog-workaround".

WOW yes indeed! Thank you very much!

But how can we do the Schlick (or any) variation to Phase input? I tried every possible node output but Phase input does not accept any

Antti

Fri Nov 13, 2015 11:47 am

it works very well!!!!

thanks!!!

Tue Nov 24, 2015 5:39 pm

This is very interesting. I have seen another "fake" volumetric with lights and it takes forever to render. This however in my quick testing is actually quite fast.

I find a few issues for me. Maybe it's just me not knowing things...

1. You can't have the camera INSIDE the volume box correct? This limits camera moves for animation.
2. For me it doesn't seem to have a pronounced depth fog...more of a mist/haze. In your test scenes it appears correctly...

Thanks for sharing...this may all change in Octane 3 but until then...nice one.

Tue Nov 24, 2015 5:45 pm

A quick work around for the camera inside the VOLUME is to cut a circle out and place the camera inside the void. Then parent the VOLUME to the camera and now your always inside the volume...as you get close to things the fog goes away...like in real life. not bad!

Wed Nov 25, 2015 11:16 am

Hi,

Good idea!

BTW, I´m working on this river scene. See my wip.

I´m having trouble with the water. I would like to have a highly reflective but very muddy water (like here https://treeonline.files.wordpress.com/ ... ver-01.jpg )
Any tips?

Wed Nov 25, 2015 12:12 pm

Nevermind,
I got pretty much the effect I was after.

Wed Nov 25, 2015 3:14 pm

Builtdown wrote:Nevermind,
I got pretty much the effect I was after.

WOW! Amazing render!
Could you please reveal a bit which tools you have used, LW + Octane of course but what else and for which parts?

I am working on a project (just for fun, no business) that has similar elements so I would like to know what are the best tools, I have planned to use RealFlow for water and maybe HDR Light Studio for sky but if you have other and especially easier tools to suggest, please tell

Antti

Wed Nov 25, 2015 3:15 pm

atnreg wrote:
Builtdown wrote:Nevermind,
I got pretty much the effect I was after.
WOW! Amazing render!
Could you please reveal a bit which tools you have used, LW + Octane of course but what else and for which parts?

I am working on a project (just for fun, no business) that has similar elements so I would like to know what are the best tools, I have planned to use RealFlow for water and maybe HDR Light Studio for sky and XFrog plants but if you have other and especially easier tools to suggest, please tell

Antti

Wed Nov 25, 2015 5:46 pm

Hi,

Thanks. Nothing special here.
LW+Octane. Couple of tree models, few grass models, LW instancer, water is just glossy plane with procedural bump, sky is a mapped plane, Octane sun light as only light. Fog is same as in the first post here. Some photoshop postproduction.
I think I will make a short animation with this. I will probably use a HDR sky image as Texture Environment and animate the water bump.

Muuten, mun firman sivut löytyy Spiral One-nimellä. Olen käyttänyt Octanea töiden parissa reilun vuoden. Sitä ennen käytin FPrimea.

- Juha