"posfan12" <nomail@nomail> wrote:
> How do you control the density of a medium at a given point?
>
> For instance, if you use a spherical pattern then the medium is fully opaque at
> the center of the sphere, and is fully transparent at the outer radius.
>
> BUT, what if I want the sphere to be 25% transparent at 1/3 of the distance from
> the center?
>
> How do I control that?
>
> Thanks!
>
>
> Mike

Hi Mike,

you can use color_maps or density_maps within the media. Something like this:

 media{
    emission 0.75
    scattering {1, 0.5}
    density { spherical
      density_map {
        [0.0 rgb 0]
        [2/3 rgb 1]
        [1.0 rgb 1]
      }
    }
  }

Best regards,
Michael

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