Can't create fog

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thefett
Posts: 6
Joined: Wed Jun 15, 2016 10:03 pm

Can't create fog

Postby thefett » Mon Oct 30, 2017 6:25 pm

Hi,
I'm following the tutorials, created a null cube with 12:12:12 scattering. Also tried cone and various other scattering levels and different light sources. Tried camera inside and out of volume and light inside and outside of volume. Tried fog volume on either inside or outside surface or both. Always get no scatter - renders like cube is air filled (with outside wall foggy if light source is outside it). Any ideas?

PlatnumK
Posts: 129
Joined: Tue Mar 01, 2016 5:12 pm

Re: Can't create fog

Postby PlatnumK » Mon Oct 30, 2017 7:47 pm

What are you Acceleration Settings & Your Scene Settings

thefett
Posts: 6
Joined: Wed Jun 15, 2016 10:03 pm

Re: Can't create fog

Postby thefett » Tue Oct 31, 2017 4:22 pm

cpu-accel, no boost, 0 CL group
sobol, mono-directional. 1FF, noise unaware, 16 path length

Just tried no-accel, metropolis, bi-directional and got some fog - thanks!

Grrr... seems intermittent though. I merged new items into the same fog scene, scaled up the fog size and the fog went away again.
Looks like another key factor is having the camera outside the fog volume.

PlatnumK
Posts: 129
Joined: Tue Mar 01, 2016 5:12 pm

Re: Can't create fog

Postby PlatnumK » Tue Oct 31, 2017 8:48 pm

I good guide to read is the 'Reality Render Options' by Sigstan as it gives a good idea on what is supported in each of the various render modes

viewtopic.php?f=23&t=536

thefett
Posts: 6
Joined: Wed Jun 15, 2016 10:03 pm

Re: Can't create fog

Postby thefett » Tue Oct 31, 2017 10:47 pm

Thanks - had a read through it.

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sigstan
Posts: 437
Joined: Sat Jan 24, 2015 3:59 pm
Location: Denmark

Re: Can't create fog

Postby sigstan » Thu Nov 02, 2017 3:30 am

/Sigstan

thefett
Posts: 6
Joined: Wed Jun 15, 2016 10:03 pm

Re: Can't create fog

Postby thefett » Thu Nov 02, 2017 12:36 pm

Yup, thanks got that. Still having intermittent failures, but going with a good file and adjusting things one small thing at a time. So far so good.


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