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"MichaelJF" <mi-### [at] t-online de> wrote:
>
> BTW: Your example is hard to understand without the df3-file...
>
> Michael
Look my topic:
http://news.povray.org/povray.binaries.images/message/%3Cweb.553fcb648d10ac1c7a3e03fe0%40news.povray.org%3E/#%3Cweb.553
fcb648d10ac1c7a3e03fe0%40news.povray.org%3E
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Le 15-04-28 12:58, Stephen a écrit :
> On 28/04/2015 16:33, MichaelJF wrote:
>> First a voxel within a df3-file can contain only a color and if the
>> color at the
>> border of the box described by the df3-file is not black which is
>> density zero
>> you will see the bounding box. So if you use df3 here you must assure
>> that the
>> fire is inside this box completely.
>
> This is very true.
> Another thing when using df3 files is that you can have several inside
> one media.
> The example below is from an old test of a bi-cubic Mandelbrot I did
> about 10 years ago. (Andrew/Orchid supplied the code for me to make the
> df3 files.) I posted the code and instructions to make them in
> povray.binaries.misc 2005
>
> I cannot remember why I used Red, Yellow and Blue.
Looking at your sampling parameters, and I say: "Ouch!"
1- With method 3, intervals must be set to 1. Any other value
dramaticaly increase the rendering time, and may cause some artefacts.
2- samples only use the first value. If a second value is present, it
will be silently ignored.
3- confidence, variance and ratio are NOT used in any way. The are
specific to method 1 and 2 ONLY.
method 3 is the default method and don't need to be precised.
>
> #declare df3_cube01bddf_0 =
> material{
> texture {
> pigment {
> color rgbft <1.000,0.000,0.000,0.000,1.000>
> }
>
> }
>
> interior{
> ior 1.000
> caustics 0.000
> dispersion 1.000
> dispersion_samples 7.000
> fade_power 0.000
> fade_distance 0.000
> fade_color rgb <0.000,0.000,0.000>
> media {
> method 3
> intervals 20
> samples 3, 6
> confidence 0.900
> variance 0.008
> ratio 0.900
> absorption rgb <0.000,0.000,0.000>
> emission rgb <1.000,0.000,0.000>
> aa_threshold 0.100
> aa_level 4
> density {
> density_file df3 "F:\Graphics\B3D Data\Maps\DF3\Mikes05r2.df3"
> interpolate 1
> scale <2.000,2.000,2.000>
> translate <-1.000,-1.000,-1.000>
> }
>
> }
>
> media {
> method 3
> intervals 20
> samples 3, 6
> confidence 0.900
> variance 0.008
> ratio 0.900
> absorption rgb <0.000,0.000,0.000>
> emission rgb <0.000,0.000,1.000>
> aa_threshold 0.100
> aa_level 4
> density {
> density_file df3 "F:\Graphics\B3D Data\Maps\DF3\Mikes05b2.df3"
> interpolate 1
> scale <2.000,2.000,2.000>
> translate <-1.000,-1.000,-1.000>
> }
>
> }
>
> media {
> method 3
> intervals 20
> samples 3, 6
> confidence 0.900
> variance 0.008
> ratio 0.900
> absorption rgb <0.000,0.000,0.000>
> emission rgb <0.400,0.400,0.000>
> aa_threshold 0.100
> aa_level 4
> density {
> density_file df3 "F:\Graphics\B3D Data\Maps\DF3\Mikes05y2.df3"
> interpolate 1
> scale <2.000,2.000,2.000>
> translate <-1.000,-1.000,-1.000>
> }
>
> }
>
> }
>
> }
>
>
For your 3 medias, use this:
media{
samples 100 // more samples and faster
absorbtion...
<rest of the media goes here>
}
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On 30/04/2015 00:15, Alain wrote:
> Looking at your sampling parameters, and I say: "Ouch!"
So do I, now. :-)
IIRC they were the Moray defaults that were imported into Biship3D.
It was 10 years ago when I made the scene.
--
Regards
Stephen
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On 30/04/2015 06:10, Stephen wrote:
> It was 10 years ago when I made the scene.
And when I look at the old files. I don't understand why I made the
decisions I did when I defined the colour maps to make the df3 files.
I think that I will revisit this.
BTW Is there another method of making df3 files other than tga2df3?
--
Regards
Stephen
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On 30/04/2015 09:21, Stephen wrote:
> BTW Is there another method of making df3 files other than tga2df3?
There is:
http://fly.mpi-cbg.de/~saalfeld/Projects/df3.html
--
Regards
Stephen
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On 30/04/2015 09:21, Stephen wrote:
> On 30/04/2015 06:10, Stephen wrote:
> BTW Is there another method of making df3 files other than tga2df3?
there's a Tcl script ("MakeDF3.tcl") by Darren New from 2009. (sorry,
don't have the URL)
regards, jr.
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On 30-4-2015 12:23, Stephen wrote:
> There is:
>
> http://fly.mpi-cbg.de/~saalfeld/Projects/df3.html
>
This one looks interesting. Thanks. Not tried yet but I will soon.
--
Thomas
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On 30-4-2015 13:16, jr wrote:
> On 30/04/2015 09:21, Stephen wrote:
>> On 30/04/2015 06:10, Stephen wrote:
>> BTW Is there another method of making df3 files other than tga2df3?
>
> there's a Tcl script ("MakeDF3.tcl") by Darren New from 2009. (sorry,
> don't have the URL)
>
> regards, jr.
>
That would be this:
http://news.povray.org/povray.binaries.utilities/thread/%3C4a2870e2%40news.povray.org%3E/?ttop=398992
Note Clipka's comment. I did not remember that new feature of version 3.7.
--
Thomas
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On 30/04/2015 12:44, Thomas de Groot wrote:
> On 30-4-2015 12:23, Stephen wrote:
>> There is:
>>
>> http://fly.mpi-cbg.de/~saalfeld/Projects/df3.html
>>
>
> This one looks interesting. Thanks. Not tried yet but I will soon.
>
I am playing with it ATM.
And having some problems.
When I get it sorted I'll start a new thread.
I found a df3 viewer as well but cannot find Darren's
--
Regards
Stephen
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On 30/04/2015 12:56, Thomas de Groot wrote:
> On 30-4-2015 13:16, jr wrote:
>> On 30/04/2015 09:21, Stephen wrote:
>>> On 30/04/2015 06:10, Stephen wrote:
>>> BTW Is there another method of making df3 files other than tga2df3?
>>
>> there's a Tcl script ("MakeDF3.tcl") by Darren New from 2009. (sorry,
>> don't have the URL)
>>
>> regards, jr.
>>
> That would be this:
>
>
http://news.povray.org/povray.binaries.utilities/thread/%3C4a2870e2%40news.povray.org%3E/?ttop=398992
>
>
Thanks jr and Thomas
> Note Clipka's comment. I did not remember that new feature of version 3.7.
>
Drat! More things to learn. ;-)
--
Regards
Stephen
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