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first off I'm a newbie pov user so if I state anything bare with me
(only using pov around 2 weeks)
anywho I was messing around with the media keyword trying to get some
kind of volumetric lighting in the scene I was working in, and since the
pov-ray docs are pretty lacking in there explination of the media
keyword I opened up one of the sameple files and copy and pasted the
code
now what I was trying to do was get a solid blue beam of light, but
insted what I got looks more like a particle stream. which is really
cool and I'm glad I got it, but I'd like to know why it did what I
did...I'd like to be able to reproduce that effect and actully
understand the media keyword since it's kinda complicated
anyway here is the code I used for the light (image is available here
http://www.angelfire.com/on2/lycsorp/images/silence640x480.jpg )
----------
//-----
//-----
//define particulate media
media {
intervals 20
scattering {3, rgb .02}
samples 1, 10
confidence 0.9999
variance 1/1000
ratio 0.9
}
//-----
//-----
light_source {
<0,10,initial_depth>
color rgb <1,1,2>*100
cylinder
point_at <0,0,initial_depth>
radius 10
falloff 10
media_attenuation on
}
-------
so if someone wants to explain why the light beam looks like a particle
srteam I would be most greateful,
thanks!!
P.S this is really for the pov team. I've been using bryce (*gags*)
before to do my rednering and I just couldn't handle the freaking klunky
interface so I tried out pov and boy am I impressed!!! for free it does
more then a lot of programs I've seen and since it's really just a
programing language it's more powerful. great job and keep up the good
work!!
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Basically you have a 'scattering'-only media there, for one thing, and
'intervals' is going to matter most. Use a large intervals number to get
smoother "atmospheric" media, smaller number for speckles. It helps
greatly (even required almost) to have a "world container" object
instead of nothing at all or 'sky_sphere' or 'background' alone when
trying for smooth media. The container helps to confine the media
better. Use 'density' in it too and you'll see a change.
As you may find, 'media' is not a well known subject, by all anyway.
Mostly well known for it's peculiarities as you have seen. Keep reading
and asking about it.
daishi wrote:
>
> first off I'm a newbie pov user so if I state anything bare with me
> (only using pov around 2 weeks)
>
> anywho I was messing around with the media keyword trying to get some
> kind of volumetric lighting in the scene I was working in, and since the
> pov-ray docs are pretty lacking in there explination of the media
> keyword I opened up one of the sameple files and copy and pasted the
> code
>
> now what I was trying to do was get a solid blue beam of light, but
> insted what I got looks more like a particle stream. which is really
> cool and I'm glad I got it, but I'd like to know why it did what I
> did...I'd like to be able to reproduce that effect and actully
> understand the media keyword since it's kinda complicated
>
> anyway here is the code I used for the light (image is available here
> http://www.angelfire.com/on2/lycsorp/images/silence640x480.jpg )
> ----------
> //-----
> //-----
> //define particulate media
> media {
> intervals 20
> scattering {3, rgb .02}
> samples 1, 10
> confidence 0.9999
> variance 1/1000
> ratio 0.9
> }
>
> //-----
> //-----
> light_source {
> <0,10,initial_depth>
> color rgb <1,1,2>*100
> cylinder
> point_at <0,0,initial_depth>
> radius 10
> falloff 10
> media_attenuation on
> }
> -------
> so if someone wants to explain why the light beam looks like a particle
> srteam I would be most greateful,
> thanks!!
>
> P.S this is really for the pov team. I've been using bryce (*gags*)
> before to do my rednering and I just couldn't handle the freaking klunky
> interface so I tried out pov and boy am I impressed!!! for free it does
> more then a lot of programs I've seen and since it's really just a
> programing language it's more powerful. great job and keep up the good
> work!!
--
omniVERSE: beyond the universe
http://members.aol.com/inversez/homepage.htm
mailto://inversez@aol.com?Subject=PoV-News
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