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Help Adding Fog to Scene (project file included)!

Posted: Wed Jun 14, 2017 11:06 pm
by Pires
Ive been hearing a lot about the environmental fog features in V3 so downloaded and modified a scene from the internet (beeple) and added some smoke to try get to grips with it. Heres how the original looks:

Image


I thought the neon tube lighting would look great with some moody dry-ice type fog, but I just cant seem to get a good result! :| Hopefully you can see the style I'm aiming for though:

Image


The problem is theres so many variables and options (density, volume step length, absorption color, scatting color, phase, noise shader, emision brightness, camera exposure, bloom etc!) that its a bit overwhelming!

The second issue is that, as you can see, the resulting images with fog all seem to be extremely noisy. Even with high samples and tweaking the GI Clamp and Coherent Ratio parameters.

The demo scenes provided here are good for learning some of the basic principles, but are not production quality scenes so when it comes to actually making something that looks presentable its easy to get a bit lost in the options!

So I thought the best way is if someone could kindly download the scene and tweak it until it looks good then re-upload then we could all use the settings as a good starting point for other scenes.

Many Thanks 8-)

Re: Help Adding Fog to Scene (project file included)!

Posted: Thu Jun 15, 2017 11:07 am
by pxlntwrk
Hi,

here an attempt tweaking a bit kernel settings and increasing a bit Voxel mult. (render) in Volume Object "Generate" tab
It is not perfect yet but it is already a track...
Image

ciao!

Re: Help Adding Fog to Scene (project file included)!

Posted: Thu Jun 15, 2017 11:54 am
by VVG
1. neon tube light model - it`s complex geometry for light source octane. And their number is also large. It is necessary to wait a long time for a clean picture.
Try to fake and create a simple geometry for the light source

2. Your fog density is too high (100). Try to reduce to 0.16 - 0.2


In the example cube with Medium material and Volume fog

Re: Help Adding Fog to Scene (project file included)!

Posted: Thu Jun 15, 2017 10:01 pm
by EpicJCreations
Hello :).

Here is the rework of the file I did :)
Image

Re: Help Adding Fog to Scene (project file included)!

Posted: Sat Jun 17, 2017 11:15 pm
by Pires
Many thanks for the replies and taking the time to download and tweak the scene - this community is awesome :D

Love the look of those renders!! 8-) It seems like largely then we just have to accept that to get noise free renders with smoke and bright complex lighting its going to take a lot of samples and a lot of time! Which kinda rules out animation for the time being (unless you have a render farm ofc!)

Re: Help Adding Fog to Scene (project file included)!

Posted: Sun Jun 18, 2017 6:03 pm
by TonyBoy
It is often that visible defects in a given still do not make it to 'noticeable' in an animation where frames zoom by so fast that any individual defect isn't necessarily propagated in the next frame.