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Some_Yahoo <no### [at] way com> wrote:
> Look, I'm not looking for super accuracy here, just a little media to scatter my
light sources.
>
> right now I' looking down a long corridor so I made this.
>
> #declare media_box=box{
> <-10,-10,-50><10,30,200>
> hollow
> pigment{color rgbf 1}
> interior{
> media {
> intervals 9
> scattering { 1, rgb 0.03 }
> samples 1, 10
> confidence 1/10
> variance 1/1000
> ratio 0.9
> }
> }
> }
>
> however, when I use it my render takes many hours to complete.
> is there something that can produce a simple, easy haze to scatter my light and
take, oh say 10 minutes?
Yes, your media settings are less than optimal. I don't know if this is an
older scene or not, but the default method for media is now 3. As such, the
intervals should be left at one, and the samples only needs one value. You can
read more about this in the documentation.
I changed your settings to as below and it renders in about 3 minutes @ 800 x
600 (no aa) on a Q9550 using the beta. If your are using 3.6, it'll be longer
but fairly close to the ten minute mark if your machine is in the 2.8GHz range.
//-------------
interior{
media {
intervals 1
scattering { 1, rgb 0.01 }
samples 10
confidence 0.9
variance 1/1000
ratio 0.9
}
}
//-------------
The important difference is the intervals - the number of samples is basically
multiplied by the number of intervals, so your render will take longer.
In any case, if I may offer some constructive criticism on the scene in general,
it will be much more realistic to use attenuation for the lights, both media and
distance. This may require additional tuning of light brightness, but this can
be done without the media. You also may want to consider using radiosity.
Currently, the media in the scene is overwhelmingly bright. If this is not on
purpose, then you can thin the media or boost the absorption (either by the
extinction keyword or adding an absorption component).
HTH
-Reactor
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