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... to ruin my scene. :-) Really, it is. The three media containers simply will not
merge
together well. I'm sure I've heard others say before that multiple containers having
differing
media won't work perfectly and I believe it. I tried various ways to CSG them or
leave
separate.
What you see here is the separated way but doesn't matter in how the media is
rendered.
To explain what to look for (although obvious enough), in the middle of the funnel
part a
lightened section shows. That's the top of the "halo" funnel. And above the plume of
dirt or dust
is a darkened area where it's sphere container boundary is. Then there's the very
visible
lower part of the funnel down to the ground. It won't start to disappear until the
dust
is nearly black.
I thought I might stumble upon a better look for it since first making the animation
of
this
however I've been doing other things.
So, if anyone has any recommendations I'd be pleased to hear.
I should point out how the rest of the scene is mostly there for fill. I think I
might
have over-sized
grain silos, and I know I have way too large furrows plowed there.
I owe a thankyou to Wil Hale who had asked about making a dustdevil at the p.a-u.
group.
This still image is posted here because Rick [Kitty5] had suggested it.
Bob
--
omniVerse http://users.aol.com/persistenceofv/all.htm
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Attachments:
Download 'tornado_badmedia.jpg' (22 KB)
Preview of image 'tornado_badmedia.jpg'
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The tornado is fine, but where are the flying cows? I demand flying cows!
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Nice one bob :)
Looks fine i think if you make the twister smaller (in relation to the
house) do a very barren ish dusty landscape witha few roads and a truck
maybe, throw in a darker sky and some rain it will look perfect
and tonyb is right, needs some cows.....(several hundred)
Rick
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I think you need to combine this with Mark Wagner's "Not a reflective sphere
over a checkered plane" posted on 3/31. I just watched Twister Sunday night,
and so the atmospheric chaos thing is still fresh in my mind.
Dirk
PS (to all): I've yet to mess with isosurfaces or nonstandard media
containers. Can an isosurface contain a media?
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I'm proud to say no creature was harmed in the making of this scene.
However you may have a good idea there.
Bob
"TonyB" <ben### [at] panama c-comnet> wrote in message news:39050e56@news.povray.org...
| The tornado is fine, but where are the flying cows? I demand flying cows!
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Thanks. The scale isn't easy to decide. I didn't think out any sort of measure for
this.
It does really need a more complete scene to do it any justice, maybe I'll be able to
get
more done on it someday.
Bob
"Rick [Kitty5]" <kit### [at] dialpipexcom> wrote in message
news:39056929@news.povray.org...
| Nice one bob :)
| Looks fine i think if you make the twister smaller (in relation to the
| house) do a very barren ish dusty landscape witha few roads and a truck
| maybe, throw in a darker sky and some rain it will look perfect
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| and tonyb is right, needs some cows.....(several hundred)
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| Rick
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I took another look at that one. I can see what you mean. Although that might go
best with a animation of the Tasmanian Devil whirring down from with it.
Bob
"DirkBoy" <dir### [at] lemongeckoorg> wrote in message news:39059793@news.povray.org...
| I think you need to combine this with Mark Wagner's "Not a reflective sphere
| over a checkered plane" posted on 3/31. I just watched Twister Sunday night,
| and so the atmospheric chaos thing is still fresh in my mind.
|
| Dirk
|
| PS (to all): I've yet to mess with isosurfaces or nonstandard media
| containers. Can an isosurface contain a media?
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In article <3904e6ae@news.povray.org>, "Bob Hughes"
<per### [at] aolcom?subject=PoV-News:> wrote:
> ... to ruin my scene. :-) Really, it is. The three media
> containers simply will not merge together well. I'm sure I've heard
> others say before that multiple containers having differing media
> won't work perfectly and I believe it. I tried various ways to CSG
> them or leave separate. What you see here is the separated way but
> doesn't matter in how the media is rendered.
It looks like your media containers are breaking up the sampling into
more intervals in some places than in others...increasing samples or
intervals might help. Also, was "merge {}" one of the CSG types you
tried? If this is the problem, merge {} should help, at least a little.
Another thing you might try is putting all of the media into one
container.
--
Christopher James Huff - Personal e-mail: chr### [at] yahoocom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://chrishuff.dhs.org/
TAG Web page: http://tag.povray.org/
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On Tue, 25 Apr 2000 08:07:34 -0500, "DirkBoy" <dir### [at] lemongeckoorg>
wrote:
>PS (to all): I've yet to mess with isosurfaces or nonstandard media
>containers. Can an isosurface contain a media?
Yes. It's an object like all others. You can even define the media
density with a function if you like :)
Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] usanet
TAG e-mail : pet### [at] tagpovrayorg
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From: Bob Hughes
Subject: Re: Tornado Threatens... torn media fix [~19KB Jpeg]
Date: 25 Apr 2000 22:47:37
Message: <390658c9@news.povray.org>
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"Chris Huff" <chr### [at] yahoocom> wrote in message
news:chrishuff_99-F73A41.17003925042000@news.povray.org...
|
| It looks like your media containers are breaking up the sampling into
| more intervals in some places than in others...increasing samples or
| intervals might help. Also, was "merge {}" one of the CSG types you
| tried? If this is the problem, merge {} should help, at least a little.
| Another thing you might try is putting all of the media into one
| container.
Nope, can't use a single container, at least not for this. The separate parts
have individual properties and overlapping positions. For instance,
a gradient y density_map wouldn't work well for it.
I figure you probably realized after posting the reply above that merge would
remove sections of the containers, media and all.
Turns out that the samples were too low, as you theorized. Thanks.
What prevented me from using more in the first place was the animation since
I wasn't making this to be a still image. Then I convinced myself it wouldn't change
at high enough samples anyway.
I post this message with example renders of both merge result and more samples,
should be obvious which is which. I had to adjust on the media some more after
the samples were raised so there's a difference in appearance from the original.
Btw, took 20 minutes for the "good" one at only 160 by 120 res. (resized to make
more visible), far too lengthy to get just a 90 frame animation within a single day.
Bob
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Attachments:
Download 'tornmedia.jpg' (14 KB)
Preview of image 'tornmedia.jpg'
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