Environment - Medium Radius Tweet

[tamerkseniya]

Hi, I am trying to figure out how the medium radius works. As it says in manual If a medium (either absorption or scattering) is specified, this controls the radius of the “virtual” sphere created around the camera when the medium is applied

So it should be same as if setting sphere with inverted normals manually around the camera, and controlling its radius to set distance of how far the fog will start from camera. But when I increase medium radius my scene fills up with dense fog, instead of getting further from camera, the more I increase the radius the more scene gets filled with fog, and nothing happens to starting distance.

Maybe I do something wrong, any ideas?

[tamerkseniya]

Hello! is there anyone?

[paride4331]

Hi tamerkseniya,
https://render.otoy.com/forum/viewtopic.php?f=9&t=56728&p=291355&hilit=fog+medium#p291182
https://render.otoy.com/forum/viewtopic.php?f=21&t=56599
Regards
Paride

[tamerkseniya]

Thank you for answer!

Now I see that I didn't understand correctly the use of medium radius. In this case, I still have a problem.
How can I control the distance of fog from camera. Lets say objects 5 meter close to camera are not in fog and have clear vision, but objects further then 5 m are in fog?

Edit: I attach screen shots of what I try to explain. Is there a parameter controlling this?

[paride4331]

Hi tamerksenya,
In daylight, the fog starts from the camera, if you want a fog away from the camera, you have to make a cube fog at the distance you want.
Attached a scene file and a screenshot to set the fog density.
Regards
Paride

[Singlebit]

Hello. I see that the fog has almost the same density in all distances from camera. What I do wrong? I try to setup the settings for near objects were seen clearly and in 500 meters they disappeared in the fog.
It is the best I can do now.
May be it can be done only with previous method from paride4331?

[paride4331]

Hi singlebit,
Are you sure 3dsMax unit of measure is in meters in your scene?
That said, if you want to have an object in the foreground "out of the fog" you have to use a "cube" with medium fog and place it where you want the fog begins.
Regards
Paride

[coilbook]

Hi singlebit,
Are you sure 3dsMax unit of measure is in meters in your scene?
That said, if you want to have an object in the foreground "out of the fog" you have to use a "cube" with medium fog and place it where you want the fog begins.
Regards
Paride

what if my scene is in inches but has accurate dimensions do i steel need to set medium radius where 1 equals 1 meter? or 1 is now 1 inch in daylight settings Thank you

[paride4331]

Hi coilbook,
1= 1 meter

[Singlebit]

Thank you, paride4331. I opened your scene in 3Ds Max, but scattering box draws dark line at the intersection with objects. Wat is wrong?