VRayEnvironmentFog problem

[godzycabari]

Hi everyone!

 

I have a problem with environment fog, i have tried to follow multiple tutorials, but nothing works for me.

 

Basically i have a simple interior scene with one big window with glass. i use vray dome with hdri for light, and in front of the window i have vraylight set to simple portal.

 

My problem is that under environment and effects i choose VRayEnvironmentFog and make distance and height roughly the size of my scene, but in atmosphere pass i see nothing, i tried adjusting the values, making them bigger and smaller but i still don't see a thing..

 

 

 

I hope i'm not the only one with that kind of problem, thank you in advance!

[Chris MacDonald]

Could you post a screenshot of your setup/settings?

[Andres Saarnak]

If you haven´t seen this yet- http://www.the-boundary.com/blog/2015/5/2/carey-house-tutorial-08-atmosphere

 

Try using fog gizmo box, maybe it helps.

Or maybe a scale issue?

 

It should work pretty straightforward.

[godzycabari]

If you haven´t seen this yet- http://www.the-boundary.com/blog/2015/5/2/carey-house-tutorial-08-atmosphere

 

Try using fog gizmo box, maybe it helps.

Or maybe a scale issue?

 

It should work pretty straightforward.

 

I thought it was scaling issue too, so i created new scene just with one window and light but it still doesn't work, thanks for the link tho, i'll check it out.

[godzycabari]

Could you post a screenshot of your setup/settings?

 

I don't think it will help much, but here are my settings

 

[Chris MacDonald]

Your fog distance is 100mm, so you won't be able to see anything past 100mm. And your fog height is 100mm lol. So basically you'll have thick fog, around your ankles, that doesn't scatter GI because that's disabled too. Is that what you want?

 

Basically you've loaded the default settings and it's not worked.

 

What on earth is that "scene size" bit?

 

What does your actual scene look like?

Edited January 5, 2016 by Macker

[Andres Saarnak]

Your fog distance is 100mm, so you won't be able to see anything past 100mm. And your fog height is 100mm lol. So basically you'll have thick fog, around your ankles, that doesn't scatter GI because that's disabled too. Is that what you want?

 

Basically you've loaded the default settings and it's not worked.

 

What on earth is that "scene size" bit?

 

What does your actual scene look like?

 

He wrote he tried distance and height size the same as scene size, too.

 

It should give you, at least, some results even with almost default settings. If you work in real world scale and distance and height are set up accordingly, it should work. I just tried it with the similar scene- HDRI, one room 5m x 3m, one window. The only thing I´ve changed in VrayEnvFog rollout- height and distance 4m. It´s not looking pretty, but fog is there.

[Chris MacDonald]

Perhaps I was overzealous with the douchebaggery, but we do get an enormous amount of people here that are unwilling to look for things themselves.

 

Like you said, with 100 meter+ fog distance and a normal HDRI lighting the scene, you should be able to at least see something. Does the scene render correctly with the environmentfog turned off completely?

[godzycabari]

Perhaps I was overzealous with the douchebaggery, but we do get an enormous amount of people here that are unwilling to look for things themselves.

 

Like you said, with 100 meter+ fog distance and a normal HDRI lighting the scene, you should be able to at least see something. Does the scene render correctly with the environmentfog turned off completely?

 

Scene renders correctly regardless of environmentfog. I'v been trying to do that fog effect for a long time, tried A LOT different settings, but i guess i'm missing something important, but thanks for trying to help, i'll work it out eventually.

[Andres Saarnak]

Another thing I can think of is if you´re not using gizmo box you must make sure your scene is "on the ground" and not, for example, 1000m up from zero point.

[godzycabari]

Another thing I can think of is if you´re not using gizmo box you must make sure your scene is "on the ground" and not, for example, 1000m up from zero point.

 

Yea, i always create my scenes so floor is on the zero point on Z, but i just tried, created a room 3000x5000x2500 mm with only one window, and hdri map for lighting. In encironmentfog i used 4000x4000 mm for the height and fog distance, rendered out and atmosphere pass was still completely black. :/

[Chris MacDonald]

In encironmentfog i used 4000x4000 mm for the height and fog distance, rendered out and atmosphere pass was still completely black. :/

 

4000mm is not very much at all for the distance parameter, so I'm not surprised it's rendering black - No light will be getting through. For distance you'll need a much larger value such as 100,000mm+ to even begin to achieve what you want. The height value really only needs to be as high as the highest point in your scene.

[Andres Saarnak]

4000mm is not very much at all for the distance parameter, so I'm not surprised it's rendering black - No light will be getting through. For distance you'll need a much larger value such as 100,000mm+ to even begin to achieve what you want. The height value really only needs to be as high as the highest point in your scene.

 

Atmosphere pass should render white then.

[Chris MacDonald]

Fair point. Sounds like there's something else amiss.