fog tricks

[Da_elf]

not sure if this was brought up before. how would i set up having a thick ground cover fog yet still have a full atmosphere thin mist. would i put 2 vray fogs in there with 2 different gizmos?

[LarsSonparsson]

Yes, why not. Two envFogs in same scene should work fine.
In first versions you couldn't do that without artefacts.

[Da_elf]

first versions? im still on vray1.5

[Dariusz Makowski (Dadal)]

I would use the standard max fog and gizmos...

[LarsSonparsson]

first versions? im still on vray1.5

I meant that in sp3 or 4 it wasnt working yet, but in sp5 you can allready have multible envfogs.

[Da_elf]

i still cant seem to get those lovely rays of light in the trees

[Da_elf]

would the fog subdivs be why im not getting lovely volumetric streaks of light through the trees?. oh wait. i forgot im using a smoke map in the density slot so i dont have access to subdivs

[vlado]

The sun light would have to be stronger for the rays to be visible.

Best regards,
Vlado

[Da_elf]

im using vray sun. when you say the sun needs to be stronger you mean change my apature on the camera. or actually change the multiplier on the sun?

[vlado]

You can try to either change the multiplier for the sun, or just limit the height of the fog so that less of the light is blocked.

Best regards,
Vlado

[Da_elf]

i dont know if its the scene or im just a moron but i never did get the look i hoped for

[LarsSonparsson]

What is Max version are you using?
I have working sample scene example done with 2011. I could send that to you.

[LarsSonparsson]

Ok. Here it is anyway.

Env_Fog.zip

[Da_elf]

im on max 2009 and vray 1.5

[LarsSonparsson]

im on max 2009 and vray 1.5

well of course.

I could try to make same thing with 2009 tomorrow.
There isn't anything special with my settings, so I don't understand why it isn't working in your scene.

1. What is the fog distance?
2. Are you using any gizmos?
3. Do you get better rays if you are not using any maps in smoke?
That turns the fog to be rendered using raymarcher, so it might give you different (softer) result.